Cut the block of cheese into 8 slices, then cut each slice lengthwise so you have 16 sticks of cheese. Place 2 sticks of cheese into each of the 8 peppers. If there are more than 8 peppers, divide the cheese accordingly. Arrange the chilies seam side up, side by side, in a long shallow glass baking dish that has been sprayed with cooking spray. Preheat oven to 400 degrees.