Preheat the oven to 350 F degrees. Prepare the muffin tin with muffin liners. In each of them put 2 tablespoons of graham mixture and form little crusts. Bake for 5-7 minutes. Combine all the ingredients for peanut butter filling and pour on each little pie crust. Freeze it for an hour. Prepare the chocolate ganache in the microwave oven and cover every little pie. Garnish with crushed peanuts and mini chocolate chips.