Heat oven to 350F. Generously spray twelve 2-1/2-inch muffin pan cups with cooking spray.
In medium bowl, mix crushed KELLOGG’S CORN FLAKES® cereal and butter. Divide crumb mixture evenly among muffin cups. Using a small spoon, lightly press crumb mixture against bottom and up the sides of cups.
In second medium bowl, whisk eggs, milk, salt, and pepper until blended. Add cheese, and peppers and onions; mix well. Spoon into muffin cups, dividing evenly.
Bake in 350F oven for 13 to 14 minutes or until centers are just set. Cool in pan on wire rack 5 minutes. Loosen egg bites from sides of muffin cups with a thin knife. Remove from cups. Serve with salsa, if desired.