Gluten Free High Protein Lunch Snack
1. Put the tuna and half of the oil from the can in a bowl and mix with the tomato puree.
2. Chop the red onion as fine as possible and add to the tuna. Cut the apple in 2 parts and remove the core. Chop the apple into small cubes and also add to the tuna. Mix everything.
3. Spread the tuna over the 8 lettuce leaves and serve as wraps.