In a medium bowl, mix together cream cheese, cheddar cheese, Monterey Jack cheese, garlic powder, salt, and pepper.
Stuff each jalapeno half with the cheese mixture.
In a shallow bowl, mix together the panko bread crumbs and Parmesan cheese. Dip the stuffed jalapenos in the melted butter, then roll in the bread crumb mixture to coat.
Place the coated jalapenos on a baking sheet. Bake in preheated oven for 15 minutes, or until golden brown.
Interesting Facts
Jalapenos are a type of chili pepper native to Mexico.
Panko bread crumbs are a type of Japanese bread crumb used to create a crunchy coating.
Parmesan cheese is an Italian cheese made from cow's milk.