Combine the spinach, artichoke hearts, cream cheese, pepper jack cheese, mozzarella cheese, garlic, and red pepper flakes in a mixing bowl.
Preheat the oven to 350° F. Spray a cupcake tin with olive oil spray and press the wonton wrappers down using your fingers. Bake the wonton wrappers for 5 minutes.
Fill the wonton cups with 1 tbsp of the filling and bake for 10-12 minutes, or until the wonton wrappers are golden brown and the filling is heated through. Garnish with parsley and serve hot!