My kids loved these.
¼ cup chopped pickled jalapeño chiles
¼ cup shredded cheddar cheese
8 ounces room temperature cream cheese
2 lbs. boneless skinless chicken breasts, flattened
2 tablespoons butter, melted
Mix jalapeños and shredded cheddar into cream cheese. Lay breasts on a parchment lined baking sheet. Spread mixture evenly over breasts. Roll up and secure with a toothpick. Bake at 350° until cooked through, 20 to 25 minutes. Brush with melted butter and brown under the broiler, 3-5 minutes
Adapted from: Everyday with Rachael Ray, March 2012: Jalapeno Popper Chicken Breasts