Syn Free Slimming World Cheese & Onion Pasties In The Air Fryer

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Syn Free Slimming World Cheese & Onion Pasties cooked in the Air Fryer and Instant Pot. A super easy and lower calorie take on the classic war time pasty, featuring just 4 main ingredients.

Syn Free Slimming World Cheese & Onion Pasties In The Air Fryer
Syn Free Slimming World Cheese & Onion Pasties

If you read our blog yesterday you will know that we shared our favourite Syn Free Slimming World Cornish Pasties recipe.

Well if you are thinking about Cornish Pasties then a plan B is always the vegetarian version aka cheese and onion pasties.

A true favourite of mine when I was growing up and so easy to make at home with your Instant Pot and Air Fryer.

The beauty of having both these kitchen gadgets at home, is that you can prep the potatoes and onion in the Instant Pot and while they are steaming away, prepare the rest of your ingredients.

It makes the cooking process so much quicker and easier.

Syn Free Slimming World Cheese & Onion Pasties In The Air Fryer

In a true cheese and onion pasty there will be four main ingredients:

  • Cheese
  • Onion
  • Potatoes
  • Pastry

But what many people forget to mention is that the classic cheese that goes into a proper cheese and onion pasty is a mixture of cheshire and cheddar cheese.

The crumbly cheese gives it that classic old school texture and gives it that unique flavour that those from the North East of England know so well.

Syn Free Slimming World Cheese & Onion Pasties In The Air Fryer

Syn Free Slimming World Cheese & Onion Pasties

To make my Slimming World Cheese & Onion Pasties SYN FREE I have just used healthy extras in my cheese and onion pasties.

You will look at the amount of Weight Watchers Wraps and the amount of cheese and think that its well over the allowance.

Well it is…BUT there are lots of cheese and onion pasties here and it works out at a total of ½ of a HEA and ½ of a HEB per cheese & onion pasty.

Imagine having 2 of our Slimming World Cheese & Onion Pasties and it comes in at a SIMPLE HEA & HEB. Doesn’t that sound amazing???

Or try my trick and look for an alternative wraps brand that has much smaller wraps. That way you could even have 3 wraps for 1HEB.

These are the ones we found at an Aldi’s in Spain:

Syn Free Slimming World Cheese & Onion Pasties In The Air Fryer

We put the nutrition info into Slimming World and each one worked out at 1/3 of a HEB. If you look at the picture of the packaging above, you can just see how much smaller it is from the classic wrap size and how enormous it makes the Weight Watchers Wraps look.

Or even better it slipped into our pasty maker and we didn’t have to cut it down as it was the perfect size:

Syn Free Slimming World Cheese & Onion Pasties In The Air Fryer

Plus, we adore our pasty maker and we recommend that you get one for all your pastry addictions. We use ours for everything from pasties to calzone pizzas to sweet treats.

Syn Free Slimming World Cheese & Onion Pasties In The Air Fryer

Syn Free Slimming World Cheese & Onion Pasties. Not just for vegetarians, meat lovers will adore these pasties too. Loaded up with cheese, onion and potato, these are a dieter’s dream come true.
Prep Time5 mins
Cook Time12 mins
Total Time17 mins
Course: Main Course, Side Dish, Snack
Cuisine: Air Fryer
Servings: 8
Calories: 92kcal



  • Peel and thinly dice the potatoes and onion and place it in the Instant Pot Pressure Cooker. Add a cup (250ml of water), place the lid on the Instant Pot, set the valve to sealing and cook for 8 minutes.
  • While they’re steaming grate your cheese and slice your wraps in half.
  • Manually release pressure.
  • Drain the potatoes and onion and place back in the Instant Pot inner pot.
  • Add the seasoning and the grated cheese to the Instant Pot and give it a good mix, work it well with a fork so that the soft potatoes will be like semi mash.
  • Place ½ a wrap at a time into the pasty press and brush with egg. Add pasty filling to one side making sure you don’t over fill it.
  • Press it down until it resembles a pasty shape.
  • Brush with egg on the outside.
  • Place in the air fryer and cook for 2 minutes on each side at 200c/400f.
  • 10. Serve warm.


If you have leftover cheese and onion pasty filling, then add it to sandwich bags and freeze it for another time. It takes just 4 minutes in the air fryer for four cheese and onion pasties at once. Rinse and repeat until they are all cooked.
If you follow Slimming World and use the Weight Watchers wraps brand then it works out at 4HEA and 4HEB for the entire recipe. This is for 8 cheese and onion pasties making each one ½ HEA and ½ HEB.
I found that they were very filling and couldn’t possibly eat more than two. Or follow my lead and get some smaller ones and that way you can have 3 for each HEA/B instead of 2.


Calories: 92kcal | Carbohydrates: 8g | Protein: 6g | Fat: 3g | Saturated Fat: 2g | Cholesterol: 30mg | Sodium: 130mg | Potassium: 261mg | Fiber: 1g | Sugar: 0g | Vitamin A: 85IU | Vitamin C: 7.3mg | Calcium: 112mg | Iron: 1.9mg
Nutrition InfoPlease Note: Nutrition values are our best estimate based on the software we use at Recipe This and are meant as a guide. If you rely on them for your diet, use your preferred nutrition calculator.
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Syn Free Slimming World Cheese & Onion Pasties In The Air Fryer

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I’m Samantha and along with my chef husband Dominic and our three kids, we teach you how to cook smart with kitchen gadgets. You can learn more about us and how we can help you by CLICKING HERE →

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