Lay your 2 pieces of bread.
Spread 1 teaspoon of mayonnaise on each slice of bread.
On one slice of bread place 3 slices of the turkey depending on how much meat you like on your sandwich.
Take one slice of cheese and lay it on top of the turkey.
Take fresh lettuce, onion, and tomato and put them on top of the cheese.
Lay the other slice of bread over the rest of the sandwich