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Home » Side dishes & Salads » Roasted baby potatoes with mushrooms and onions

Roasted baby potatoes with mushrooms and onions

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Crisp, golden roasted baby potatoes with tender caramelised onions and delicious earthy mushrooms. Easy to make and so versatile! A fabulous vegan side dish.

Do you have recipes that have evolved over decades of cooking? This is one of mine. It’s almost indistinguishable from where it started, but it’s still delicious!

roasted potatoes, onions and mushrooms.

On this page...

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  • Historical cooking?
  • Microwave cooking – Don’t believe the hype
  • Roasted baby potatoes – amendments and improvements
  • Ingredients for roasted baby potatoes
  • What goes with roasted baby potatoes?
  • Roasted baby potatoes with mushrooms and onions
  • More delicious potato recipes

Historical cooking?

If you cast your mind back to the 1980s, when microwaves were new and cutting edge, you’ll find the origins of this delicious potato side dish.

raw potatoes, onions and mushrooms.

When my Mum got her first microwave, it came with a helpful booklet of suggested recipes. Dishes that would prove the microwave wasn’t just for quick defrosting or reheating. One of the recipes cooked little potatoes together with onions and mushrooms to make something a bit like these roasted baby potatoes. 

However, there were some problems.

Microwave cooking – Don’t believe the hype

Cooking these potatoes in the microwave wasn’t all it was cracked up to be.

Firstly, there was a lot of taking dishes in and out of the microwave, stirring, putting back, leaving to stand etc. Secondly, the potatoes never got that gorgeous golden crispy crust that roasting provides. And thirdly, it wasn’t even really any quicker than just cooking them in the oven!

Roasted potatoes with onions and mushrooms.

Personally, I think that baby potatoes roasted in a hot oven are THE BEST. They get crispy, golden and delicious. Plus, once you’ve mixed up your ingredients and popped the tray into the oven, you can forget about them and get on with something else. What could be easier?!

Roasted baby potatoes – amendments and improvements

Over the years, I’ve tinkered with the recipe by taking the basic idea – a yummy side dish of baby potatoes, mushrooms and onions – and altering not only the cooking method, but also the seasonings. I think I finally hit the jackpot when I decided to add some lemon juice which brings a delicious freshness to the finished dish.

Lemon on a glass lemon squeezer.

Ingredients for roasted baby potatoes

This delicious side dish is very easy to make and only has a few basic ingredients. To make it you will need:

  • baby potatoes – of course!
  • mushrooms
  • onions
  • olive oil
  • oregano
  • garlic powder
  • fresh lemon juice – zingy!
  • salt and pepper

And that’s it! It’s amazing how just a handful of simple items can create something so tasty!

roasted baby potato on a fork.

What goes with roasted baby potatoes?

These yummy roasted baby potatoes are almost good enough to serve as a main dish. Well, I could eat a whole plate of them, anyway. Ahem. But they go brilliantly with almost anything. We enjoy them with fish, grilled veggies, griddled halloumi cheese, veggie sausages or burgers… They are super-versatile.

This is also a fabulous recipe to have up your sleeve for Pesach! Potato fatigue can be a real problem, so having a few easy, tasty spud recipes to call on is a life saver! Serve with a crustless quiche and some salad and you’re all set.

Crisp, golden roasted baby potatoes with tender caramelised onions and delicious earthy mushrooms. Easy to make and so versatile! A fabulous vegan side dish.

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📖 Recipe

Roasted potatoes with onions and mushrooms.

Roasted baby potatoes with mushrooms and onions

Prevent your screen from going dark
Crisp, golden roasted baby potatoes with tender caramelised onions and delicious earthy mushrooms. Easy to make and so versatile!
3.67 from 6 votes
Print Recipe Pin Recipe Save Saved!
Prep Time 10 minutes mins
Cook Time 35 minutes mins
Total Time 45 minutes mins
Course Side Dish
Cuisine European, Vegan, Vegetarian
Servings 4
Calories 313 kcal

Ingredients
 
 

  • 800 g baby new potatoes
  • 300 g small white mushrooms
  • 2 small/medium onions
  • 1½-2 tablespoon fresh lemon juice
  • 4 tablespoon olive oil
  • 1 teaspoon dried oregano
  • 1 teaspoon garlic powder
  • salt and pepper to taste

Instructions
 

  • Preheat the oven to 200°C (400°F).
  • Scrub the potatoes if required. Cut any larger ones in half or quarters. Brush any dirt from the mushrooms and cut in halves or quarters, depending on their size. The pieces should be about 2cm (1 inch) in size.
  • Peel the onions and cut each one into 8 wedges. Mix the potatoes, mushrooms and onions together.
  • Whisk together the lemon juice, oil, oregano, garlic powder and seasonings. Pour over the potato mixture and gently toss to coat. Spread everything out into a large baking sheet to give a single layer.
  • Roast in the hot oven for around 35 minutes until the potatoes are cooked through and crispy, and the onions are caramelised. Transfer to a serving bowl, eat and enjoy!

Nutrition

Nutrition Facts
Roasted baby potatoes with mushrooms and onions
Amount per Serving
Calories
313
% Daily Value*
Fat
 
15
g
23
%
Saturated Fat
 
2
g
13
%
Sodium
 
18
mg
1
%
Potassium
 
1153
mg
33
%
Carbohydrates
 
42
g
14
%
Fiber
 
6
g
25
%
Sugar
 
5
g
6
%
Protein
 
7
g
14
%
Vitamin A
 
14
IU
0
%
Vitamin C
 
46
mg
56
%
Calcium
 
43
mg
4
%
Iron
 
2
mg
11
%
* Percent Daily Values are based on a 2000 calorie diet.
Keyword mushrooms, onions, potato
Tried this recipe?Let us know how it was!

More delicious potato recipes

More delicious potato side dishes for you to enjoy include

  • amazing garlic and herb potato wedges
  • wonderful scalloped potato roast
  • delicious Greek potatoes with lemon
  • tangy potato salad with herbs
roasted baby potatoes, onions and mushrooms.

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Reader Interactions

Comments

  1. Suzie T

    January 07, 2026 at 9:33 am

    5 stars
    I tried this recipe the first time and it was good, but a little bland. So the 2nd time, I added parsley, a little Worcestershire sauce and made the onions, mushrooms, and potatoes into larger cuts. It tastes great. But, I also noticed that the mushrooms and onions seemed a little overcooked. So next time I will bake the potatoes for 5-10 minutes before adding the mushrooms and onions. Thanks for the recipe

    Reply
  2. Cookilicious

    March 26, 2020 at 4:08 pm

    They look so delicious..tempting me to try

    Reply
  3. Chef Mireille

    March 24, 2020 at 5:20 pm

    Baked potato is pretty much the only thing I will cook in the microwave. I have even known people who cook meat in the microwave. I don’t get that. For me, microwave cooking is pretty much just for reheating. I would love these and yes will definitely be using the oven!

    Reply
  4. Cathleen @ A Taste of Madness

    March 24, 2020 at 4:15 pm

    I have been obsessed with roasting veggies lately, so this is right up my alley! Making this tonight, thanks for the recipe!!

    Reply
    • Helen

      March 24, 2020 at 4:17 pm

      Thanks Cathleen! I hope you enjoy them.

      Reply
  5. Jessica

    March 24, 2020 at 3:53 pm

    I love the idea of adding mushrooms to the roasted veggies. This looks like a great weeknight side to make without a lot of work.

    Reply
    • Helen

      March 24, 2020 at 3:54 pm

      Thanks Jessica. Yes, it’s super easy and comes out great every time.

      Reply
  6. Carrie Robinson

    March 24, 2020 at 3:42 pm

    This would make the perfect side dish served alongside a nice, juicy steak. 🙂

    Reply
    • Helen

      March 24, 2020 at 3:44 pm

      Thanks Carrie. I don’t eat steak but I’m sure DH would agree!

      Reply
3.67 from 6 votes (5 ratings without comment)

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I’m Helen, Jewish mum, flexitarian kosher cook, and food blogger, and I love to share meat-free, delicious recipes with a British Jewish twist. Take a look around and see what you can discover!

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