Caramelised Onion Cheese Toasties
This upgraded cheese toastie recipe takes something every day and makes it a little more special! It's great if you're counting calories or following a plan like Weight Watchers.
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NutritionPer Serving
- Calories237
- Carbs29g
- Protein13g
- Fat6.5g
- Saturates3.1g
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For the full list of ingredients and comprehensive instructions, please see the recipe card at the end of this post. Before you scroll, there’s important stuff to know in the blurb!
A cheese toastie is the ultimate comfort food and our Caramelised Onion Cheese Toasties are a tasty twist on this classic dish.
We’ve used a strong, reduced fat cheddar in this recipe to make it a little bit healthier and keep the calories and Points down, but if you prefer you could use brie, blue cheese or goat’s cheese instead – just remember to adjust the calories and Points accordingly!
The addition of veggies makes these Caramelised Onion Cheese Toasties extra special and super filling and if you’re not a fan of mushrooms then you can substitute these for cherry tomatoes instead. This recipe works really well when served on its own for lunch, but it’s also really tasty served with a side salad.
What diets are these Caramelised Onion Cheese Toasties suitable for?
These Caramelised Onion Cheese Toasties are suitable for vegetarian diets (but please double check that your chosen cheese is suitable for vegetarians).
They can be made suitable for gluten free diets by swapping the following ingredients out for gluten free alternatives;
- Wholemeal bread
You can also make this recipe suitable for dairy free diets by swapping the following ingredients out for dairy free alternatives;
- Reduced fat cheddar
Please make sure to double or triple check all of your ingredients if you’re cooking for people with allergies.
Do you need any special ingredients to make these Caramelised Onion Cheese Toasties?
This really is super simple to make and you don’t need any fancy ingredients.
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‘Brilliant lunchtime recipe idea. This toastie filled me up and kept me going until dinner. Nom nom!’
This post contains affiliate links: what this means
You’ll need a good quality frying pan to caramelise your onions, like this one from Amazon.
You could make this recipe in a toasted sandwich maker if you’d prefer, like this one from Amazon.
How many calories are in these Caramelised Onion Cheese Toasties?
There are 237 calories per portion in these Caramelised Onion Cheese Toasties, which means they fall into our Everyday Light category.
These Caramelised Onion Cheese Toasties are perfect if you’re following a calorie controlled diet, and fit well with any one of the major diet plans such as Weight Watchers.
As a guide, an average man needs around 2,500kcal (10,500kJ) a day to maintain a healthy body weight. For an average woman, that figure is around 2,000kcal (8,400kJ) a day. Obviously, if your goal is to lose weight then you might want to adjust these slightly! You can read more about these recommendations on the NHS website.
Step 1
Preheat the oven to 220°c.
Step 2
Over a medium/low heat, simmer the onion in the balsamic vinegar and water for 15 minutes until it has softened, and the liquid has reduced. Low and slow is key, we are aiming for soft caramelised onions, not crispy fried ones. Add a little more water if you need to.
Step 3
While the onion is cooking, lightly toast the bread and set to one side.
Step 4
Once the onions are soft and dark, add the mushrooms to the pan and gently fry for 3 minutes until softened.
Step 5
Season the mushroom and onions with salt and pepper to taste.
Step 6
Assemble the sandwiches by splitting the onion and mushroom mix between two pieces of toast, adding the spinach and sprinkling the grated cheese on top. Add the second piece of bread on top and press down.
Step 7
Spray a lined baking tray with low calorie cooking spray, place the sandwiches on and spray the tops with a little more low-calorie cooking spray. Place into the middle of the oven for 2-3 minutes, until the cheese has melted.
Step 8
Slice the sandwiches in half and serve.
What could I serve with these Caramelised Onion Cheese Toasties?
These Caramelised Onion Cheese Toasties are a fantastic, filling lunch, but if you’re looking for a more filling meal then they also work really well when served alongside any of the following dishes:
How do you know when these Caramelised Onion Cheese Toasties are cooked?
You should cook your onions for around 15 minutes or until they are soft and caramelised and the liquid has reduced and, after that, your toasties will take around 2-3 minutes in the oven for the cheese to melt.
Standard advice here in the UK is to cook food until it has reached 70°C and stayed at that temperature for 2 minutes. This is to keep your family safe.
Can you cook these Caramelised Onion Cheese Toasties any other way?
We’ve cooked our toasties in an oven, but you could use a toastie maker instead if you’d rather. Just skip the step to toast the bread and place the assembled sandwich into the toasted sandwich maker instead of the oven.
How long can you keep these Caramelised Onion Cheese Toasties in the fridge?
We’d recommend eating this recipe when fresh as it doesn’t keep very well.
Can I freeze these Caramelised Onion Cheese Toasties?
No, we don’t recommend freezing this recipe.
How do I reheat these Caramelised Onion Cheese Toasties?
These Caramelised Onion Cheese Toasties are best enjoyed fresh!
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Caramelised Onion Cheese Toasties
This upgraded cheese toastie recipe takes something every day and makes it a little more special! It's great if you're counting calories or following a plan like Weight Watchers.
-
Prep Time
5 MINS
-
Cook Time
20 MINS
- KCals 237
- Carbs 29G
Instructions
- Preheat the oven to 220°c.
- Over a medium/low heat, simmer the onion in the balsamic vinegar and water for 15 minutes until it has softened, and the liquid has reduced. Low and slow is key, we're aiming for soft caramelised onions, not crispy fried ones. Add a little more water if you need to.
- While the onion is cooking, lightly toast the bread and set to one side.
- Once the onions are soft and dark, add the mushrooms to the pan and gently fry for 3 minutes until softened.
- Season the mushroom and onions with salt and pepper to taste.
- Assemble the sandwiches by splitting the onion and mushroom mix between two pieces of toast, adding the spinach and sprinkling the grated cheese on top. Add the second piece of bread on top and press down.
- Spray a lined baking tray with low calorie cooking spray, place the sandwiches on and spray the tops with a little more low-calorie cooking spray. Place into the middle of the oven for 2-3 minutes, until the cheese has melted.
- Slice the sandwiches in half and serve.
Looking for Slimming World Syns or Weight Watchers (WW) Points?
With ever-changing plans and point calculations, we have made the decision to remove WW Points from the website - referring to your individual plan or advice from your consultant is always going to give the most accurate results.
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2 comments
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KatieSunday 21st January 2024
Would it be possible to make the caramelised onions ahead of time? If so do you know how long they would last? Thank you
HollyMonday 5th February 2024
Hey Katie, yes you could make the caramelised onions ahead and use them on a toastie when you are ready! Let them cool then keep in an air-tight container in the fridge for up to 3 days, hope that helps!
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