Do you want to hear a great new? Sandwich can be healthy and help you to reduce or maintain the weight.
This is a high-protein, moderate-fat, and low-carb meal option. If you add thyme or seasonings, the impact on calories and macros will be negligible.
For 3 servings there are ~498 kcal
Protein: ~53.6g
Fat: ~28g
Carbohydrates: ~8g

The ingredients below:

200g of tuna in brine of good quality 

1 spring onion

100g of Philadelphia similar cheese

3 cherry tomatoes 

1 large hard boiled egg

Herbal salt, pepper of choice to taste 

Thyme (optional)