A red soup mug with thick, golden cauliflower and pumpkin soup garnished with chives

Combi Steam Cauliflower and Pumpkin Soup

A red soup mug with thick, golden cauliflower and pumpkin soup garnished with chives

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I made another little steam oven recipe video to go with this week’s post because it seems you can’t get enough of them! You can view it here

The past couple of weeks have been what you might call cray-cray at our place what with all the settling into school, daycare and new work schedules. I’ve needed a few meals to satisfy the 5-minute heat and serve factor, and this steam oven cauliflower and pumpkin soup with ginger, lemongrass and coconut fits the bill perfectly.

Yep, that’s right – you can absolutely make soup in your combi steam oven. Great, huh?

This recipe is terribly inauthentic in terms of being true to any one cuisine type but I haven’t had any complaints here.

The leeks usually lend themselves to European dishes while the ginger, garlic, lemongrass and turmeric are decidedly South East Asian, as is the coconut milk – though that could also be Pacific Rim, Indian or Caribbean in origin. Take your pick. I don’t think the mish-mash of cuisines matters, as what you end up with here is something warming, cohesive, and full of depth. I love it.

I don’t make all soups in my steam oven, but generally anything I intend to turn into a pureed soup – think root vegetables, cauliflower, sweetcorn, broccoli, peppers or zucchini – goes very well. The flavours of the vegetables get intensified by the humidity and remain soft enough to blend easily, so it’s a great way to cook all your soup vegetables without having to stand and stir a pot to stop things catching before you add the liquid.

In today’s case, I used my biggest cast iron casserole pot to sweat leeks, lemongrass, ginger and garlic at a lower heat before increasing the oven temperature and layering in spices, a head of broken-up cauliflower and some diced pumpkin.

No stirring, just cook until the pumpkin is tender and starting to brown, then puree with stock and coconut milk or cream.

It’s easy, makes a huge batch of soup to keep in your fridge or freezer and there are countless ways to vary the flavour profile.

Don’t like the Asian theme I went with? Try herbs like basil or thyme instead of the ginger/lemongrass/coconut, or drop in a big handful of baby spinach leaves to wilt before pureeing. That’s the nice thing about soup – it’s forgiving and changeable depending on what you have in the fridge.

I really hope today’s post gives you an insight into how easy it is to put together a healthy, hearty soup in your steam oven using the method I’ve followed below. I’d love to hear about it in the comments or on Facebook if you give it a try.

Happy steam oven cooking, see you here again soon.

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A red soup mug with thick, golden cauliflower and pumpkin soup with snipped chives
A red soup mug with thick, golden cauliflower and pumpkin soup with snipped chives
Print Recipe
4.41 from 10 votes

Cauliflower and Pumpkin Soup with Ginger and Lemongrass

Hearty and warming, this soup is super easy to make in a steam oven, where there's no stirring!
Prep Time10 minutes
Cook Time45 minutes
Total Time55 minutes
Course: Appetizer, Main Course, Soup
Cuisine: Asian
Keyword: cauliflower and pumpkin soup, steam oven soup
Servings: 8
Calories: 237kcal


  • 3 tbs olive oil or coconut oil
  • 2 leeks sliced (onions are also fine but I love the more gentle flavour of leeks)
  • 2 stalks lemongrass tender bottom parts only, bruised and sliced
  • 2 cloves garlic roughly chopped
  • A thumb-sized piece ginger roughly chopped
  • 2 tsp ground turmeric or fresh turmeric, if you can find it where you are
  • ½ tsp cayenne pepper optional
  • 1 head cauliflower a large head, around 2lb, broken up into florets and stalks roughly sliced
  • 1.5 lb pumpkin peeled and cut into 2.5cm/1” pieces
  • 1 1/4 cups coconut cream 1 x 9oz/270ml can
  • 4 cups vegetable stock or chicken stock; you may need a little more depending on how thick you want the soup


  • Set your oven to 248⁰F/120⁰C, combination steam setting. If you have variable steam, use 80%. If not, don't worry! Just set to combi steam at the correct temperature and the oven will figure out the humidity for you.
  • Put the oil in the bottom of a large casserole pot and tilt to coat evenly. Pile the leeks, lemongrass, ginger and garlic on top of the oil (no need to stir) and place in the oven for 12 minutes. Remove and increase the oven temperature to 356⁰F/180⁰C on combination steam setting.
  • Sprinkle the turmeric and cayenne pepper over the softened leek mixture, add the cauliflower and then pumpkin (again, don’t worry about stirring).
  • Return the pot to the oven and cook until the vegetables are very soft and the pumpkin has just started to take on some colour at the edges – anywhere from 25-35 minutes. Remove from oven and allow to cool for 10 minutes.
  • Once the vegetables have cooled slightly, add the coconut cream and the stock and stir gently. Puree with a stick blender – my preferred method because everything stays in the same pot – or run batches through a food processor or blender. I like mine smooth but you could leave the soup slightly chunky. Thin with a little extra stock if it’s too thick.


Calories: 237kcal | Carbohydrates: 18g | Protein: 4g | Fat: 19g | Saturated Fat: 12g | Sodium: 499mg | Potassium: 707mg | Fiber: 3g | Sugar: 6g | Vitamin A: 7908IU | Vitamin C: 46mg | Calcium: 55mg | Iron: 3mg

But I don’t have a steam/combi-steam oven! You can make this as you would any other soup on the cooktop, though might I suggest you roast the cauliflower and pumpkin rather than boiling them for extra intensity? I’d gently sweat the leek mixture while you roast the vegetables in a 180⁰C oven for about 30 minutes (lightly coat the veg with olive oil before you roast them lest they become dry and tough), then add them to the pot with the liquid, warm through and blend.

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After other simple steam oven recipes? If you’re not sick of pumpkin after today’s post, I did something completely different with it a couple of weeks ago and made a Low Carb Pumpkin Loaf. Or maybe some more warming weeknight inspiration is your thing – try the Maple, Lime and Ginger Chicken. And there are lots of other great dinners listed in the Easy Meals index.

1 thought on “Combi Steam Cauliflower and Pumpkin Soup”

  1. 3 stars
    Made this yesterday- it was pretty good. Very easy. I would have liked even stronger asian flavors – more ginger, garlic, lemon grass.

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