- 50g Mornay Sauce (see Croque Madame recipe)
- 100g Tuna, tinned and drained
- 40g Butter, unsalted
- 1 Tbsp Red onion, diced
- 2 Tbsp Mayonnaise
- 50g Strong Cheddar
- Whole meal Sandwich bread
- ½ Lemon, juiced
- 20g Parmesan, to garnish
- Preheat your oven at 180*.
- Mix together your tuna, red onion, lemon and mayonnaise in a bowl. Season to taste.
- Cut two slices of your bread about 1 finger thick. Butter all sides. Add your tuna filling inside and the cover in grated cheddar and close.
- Between to slices of parchment paper cook your sandwich in a pan over a low heat until lightly toasted. Remove from the heat.
- Spread your mornay sauce on top of your lightly toasted sandwich and place in the oven for about 6 minutes until your sauce is bubbling on top and slightly browning.
- Finish with some grated Parmesan to garnish.
