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Home » Recipes » Slow Cooker Hidden Veg Pasta Sauce

Slow Cooker Hidden Veg Pasta Sauce

October 20, 2022 by Ciara Attwell, Updated September 19, 2025

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A tasty tomato pasta sauce cooked in the slow cooker and packed with five different hidden veggies. Perfect for fussy eating kids!

Slow cooker hidden vegetable pasta sauce served over pasta. in a colorful bowl garnished with grated cheese.

For years I’ve been making this Hidden Veg Tomato Sauce and I have a whole section dedicated to Hidden Veg Recipes For Fussy Eaters but I wanted to try a new and different version, cooked in the slow cooker so that I don’t have to stand over the hob while it simmers away.

My kids might be a little older now but it can still be a struggle to get them to eat a variety of veggies. But blending them all up into a simple tomato sauce still works wonders.

The vegetables I’ve used in this recipe are carrots, celery, courgette, red pepper and cauliflower.

I used packets of diced frozen cauliflower. I love having them in the freezer ready to pop straight into pasta sauces. But you can use fresh diced cauliflower too.

Ingredients being added to the slow cooker.

Also in the slow cooker goes a jar of passata, some water, a stock pot and dried oregano.

Cook on high for about 3.5 hours or low for 5 hours until the veggies are soft.

Ingredients all in the slow cooker ready for cooking,

Then blitz with a hand blender until the sauce is completely smooth.

The cooked hidden veg pasta sauce being blended using a hand blender until sauce is completely smooth.

This sauce is brilliant to batch make and keep in the fridge or freezer. It will keep for 3 days in an airtight container or jar in the fridge or up to 3 months in the freezer, ready to have on hand for a speedy dinner for the kids.

Aswell as a pasta sauce, this also works really well as a pizza sauce or used to make Cheese & Tomato Quesadillas.

Close up of the hidden vegetable pasta sauce served with pasta and garnished with grated cheese.

If you liked this recipe you may also enjoy my Hidden Veg Chicken Curry

If you love super easy family recipes, then check out our collection of Slow Cooker Recipes! All these recipes are easy to make and will save you heaps of time. Perfect for busy families!

And keep up to date with our latest recipes and top tips for Fussy Eaters over on Instagram or Facebook.

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Slow Cooker Hidden Veg Pasta Sauce


★★★★★ 5 from 3 reviews
  • Author: Ciara Attwell
  • Prep Time: 5 minutes
  • Cook Time: 3.5 hours
  • Total Time: 17 minute
  • Yield: 5 1x
  • Category: Hidden Veg
  • Method: Slow Cooker
  • Cuisine: Pasta Sauce
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Description

A tasty tomato pasta sauce cooked in the slow cooker and packed with five different hidden veggies. Perfect for fussy eating kids!


Ingredients

  • 1 onion, chopped
  • 2 garlic cloves, crushed
  • 2 carrots, finely diced
  • 1 celery stick, chopped
  • 1 small courgette, chopped
  • 1 red pepper, chopped
  • 150g diced frozen or fresh cauliflower
  • 680g jar of passata
  • 100ml water
  • 1 vegetable stock pot
  • ½ tsp dried oregano

Instructions

  1. Add all of the ingredients to a slow cooker and mix well.
  2. Cook on high for approx 3.5 hours or on low for approx 5 hours until the veggies are soft.
  3. Blend with a stick blender.
  4. Mix with cooked pasta and serve.

Notes

Leftover sauce can be kept in an airtight container or jar in the fridge for up to 3 days. It can also be frozen and defrosted at room temperature in 4-5 hours. Reheat on the hob or in the microwave until piping hot.

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Filed Under: Dairy Free Recipes, Egg Free, Family Meals, Gluten Free, Hidden Veg Recipes for Fussy Eaters, Nut Free Recipes, Recipes, Simple Pasta Recipes - Kid-Friendly, Slow Cooker Recipes, Vegetarian Recipes

Comments

  1. Johan says

    January 16, 2023 at 11:00 am

    My very fussy 6 year old eat the lot. Easy to make.

    ★★★★★

    Reply
  2. Toni says

    November 8, 2022 at 4:04 am

    This is my new favorite veggie spaghetti sauce. One because it was delicious and two because my 5 year old ate it!! Though I did add 3 Tbsp brown sugar to appeal to her. I didn’t have onion so used powder, and I added a cup of pumpkin since I had just cooked up our Jack o lantern. It was a little thick at the end so I added about 1/2 c broth and it was perfect. Thanks for sharing your creation Ciara!

    ★★★★★

    Reply
    • Vicky says

      November 8, 2022 at 11:08 am

      Great news Toni, so glad you like this recipe. Enjoy!

      Reply
  3. Leah Jane says

    October 28, 2022 at 9:52 am

    I have the world’s most fussy 6-year-old, I’ve tried a lot of things over time and have failed. I made this sauce thinking if she refused it me and my husband would just eat it to save waste. And I still can’t believe it she gobbled the lot and asked if we can have it again next week. Fingers crossed things are starting to improve.

    ★★★★★

    Reply
    • Vicky says

      October 31, 2022 at 10:16 am

      Hi Leah Jane, What a great success story. We love to hear feedback like this. We will all keep everything crossed here at My fussy eater that things are starting to improve for you. Please check out more of our recipes and please share with us on Facebook and Instagram.

      Reply

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Hi, I'm Ciara! I'm a food writer and cookbook author and I'm always looking for new ways to make food fun and interesting for kids! I specialise in fussy eating and share tips and tricks to get your kids eating better along with lots of family friendly recipes. Read More…

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