Healthy Tuna Melt Toastie With Sourdough

The tuna melt toastie is a beloved classic, blending warm, gooey cheese with a flavourful tuna filling. Originating in American diners during the 20th century, it became an instant hit for its simplicity and indulgence. This version, with its sourdough base and a mix of cheddar and mozzarella, combines crisp texture with melty goodness while incorporating fresh veggies for extra flavour, nutrition and crunch.

This tuna melt stands out with its perfect blend of sharp cheddar for flavour and mozzarella for a gooey cheese pull, enhanced by fresh red pepper, spring onion, and chives for added texture and nutrition. Thoughtful tips, like optional bread scoring for an epic cheese pull and spreading mayo for a golden crust, ensure a delicious and mess-free toastie that’s easy to adapt for various diets.

Are tuna melt toasties healthy?

Toasties of most types are generally considered a reasonably unhealthy or high calorie treat due to the heaps of high fat and often ultra processed ingredients involved. Tuna melt toasties however, dont have to be unhealthy and this recipe is designed to cut out the ultra processed ingredients and swaps high fat cheeses for lower calorie alternatives.

Sourdough bread is healthier because its natural fermentation process makes it easier to digest, lowers its glycemic index, and increases nutrient absorption compared to regular bread.

Peppers, onions, and chives make this dish healthier by boosting its nutritional profile with vitamins, minerals, and antioxidants, including vitamin C, vitamin K, and fiber, which support immunity, digestion, and overall health.

Low fat cheddar and mozzarella is used in this recipe to reduce the saturated fat of this tuna melt toastie and lower the calorie content from approximately 450kcal to 320kcal per toastie.

Tuna instead of processed meats like ham make this toastie healthier because tuna is high in lean protein, omega-3 fatty acids, and essential nutrients, without the added sodium and preservatives often found in processed meats.

Do you have a diet restriction?

This tuna melt toastie is:

• Nut Free
• Ultra Processed Food Free

Step 1: Create the crunchy tuna filling

Start by draining the tuna and placing it in a medium-sized bowl along with the cheddar. Add the finely diced red pepper, thinly sliced spring onion, and chives. Season with a pinch of salt and pepper, and mix in 1/3 of the mayonnaise – just enough to bind the ingredients together. Avoid adding too much mayo; the filling should be thick and reasonably dry, not runny or resembling tuna mayo. Excess mayo can cause the mixture to spill out as the cheddar melts, making the toastie difficult to handle.

Optional Step: Score the sourdough for an epic cheese pull

For an extra aesthetic touch and to achieve an epic cheese pull, lightly score both slices of sourdough where you plan to cut the toastie in half later. This step is purely optional but can make slicing easier without squashing the filling or tearing the cheese strands. When you come to cut your toastie in half, just cut through the bread and flip to cut the bread underneath. If skipping, proceed directly to the next step.

Step 2: Build your toastie

Lay one slice of sourdough on a flat surface. Scatter half the mozzarella pieces across the bread. Mozzarella is chosen for its excellent meltability and iconic cheese pull. Spread the tuna mixture over the mozzarella in a 1–2 cm thick layer, leaving a gap around the edge. You may find you have some left over tuna mixture depending on the size of your bread. Top with the remaining mozzarella pieces. Add the second slice of sourdough on top to close the sandwich, pressing gently to seal. You should also preheat your toastie maker or grill now.

Step 3: Add the finishing touch

Spread a thin, even layer of mayonnaise on the outside of both slices of bread. This is a pro tip for achieving a beautifully golden, crispy crust without needing extra butter or oil as well as adding extra flavour to the sourdough.

Step 4: Grill your tuna melt toastie

Carefully place the sandwich in your appliance. Toast for 3–5 minutes, or until the bread is golden and crisp, and the filling is warm and gooey. If using a frying pan or grill, press gently with a spatula and flip halfway through cooking for even toasting. Remove when the sourdough is well toasted and the tuna filling starts to sizzle.

Step 5: Slice and serve

Let the toastie rest for 1–2 minutes to cool slightly. This step prevents the cheese from spilling out when cut. Use a sharp knife to slice along the scored lines if you opted for scoring, or simply cut through carefully. Serve warm and enjoy immediately!

Variations

1. Add sliced tomato or avocado for a fresh twist.
2. Replace cheddar with gouda, gruyère, or pepper jack for different flavor profiles.
3. Incorporate a pinch of smoked paprika or chili flakes for spice.
4. Use wholemeal or gluten-free bread for dietary preferences.
5. Swap mayonnaise for Greek yogurt for a tangy, lighter option.

FAQ

1. Can I use chicken instead of tuna?
Yes, chicken works as a great alternative.

2. Can I use a different type of bread?
Absolutely! Wholemeal, rye, or gluten-free bread are excellent substitutes.

3. Can I make this dairy-free?
Yes, use dairy-free cheddar and mozzarella alternatives.

4. Can I prepare the tuna mix ahead of time?
Yes, store it in an airtight container in the fridge for up to 2 days.

5. Can I freeze the toastie?
It’s best not to freeze the assembled toastie, but the tuna mixture can be frozen for up to 1 month. Thaw overnight in the fridge.

6. What’s the best way to reheat leftovers?
This recipe is best served straight away.

7. What sides pair well with this toastie?
A light salad, coleslaw, or tomato soup are classic accompaniments.

Related Recipes: