Season ground turkey with salt and pepper, mix it with the hand to combine it well and then shape 2 bigger balls or 4 smaller ones. The balls need to be equally big.
Heat a griddle or a skillet until it’s very hot; place the balls of meat on the hot surface. Cover them with a piece of parchment paper, and smash them with a pan. During the cooking, flip the patty, and continue cooking on the other side.
When the patty is almost completely cooked, place a slice of cheese, and cover it with the lid to melt the cheese.
Spread butter on the burger bun, and toast the buns on the griddle or a pan until golden.
Assemble the burgers. Smear the mayo on the buns, put burger patty, tomato, and lettuce. Instead of mayo, tomato, and lettuce, you can add your favorite burger toppings. Enjoy!