Combine mayo, yogurt, parmesan cheese, basil, lemon juice, and pepper in a bowl. spread the mixture on each slice of bread.

Divide turkey and tomato slices among the bread slices.

Top the remaining bread slice

Heat the skillet with oil over medium heat. place panini on the oven, then weight it down somehow. cook until golden on one side, 2 minutes. Reduce the heat to medium low, flip the panini, and cook the other side.