Review all recipe notes and instructions before beginning.
Place 4 7-ounce ramekins on a baking sheet. Lightly grease with cooking spray.
Spoon 2 Tablespoons of sauce into one of the ramekins.
Sprinkle a pinch of italian seasoning on top of the sauce.
Tuck the corners of the cheese slice so it will fit in the ramekin on top of the sauce.
Place 5 pepperonis in a circle on top of the cheese.
Sprinkle some sausage on top of the pepperoni.
Sprinkle some bell pepper on top of the sausage.
Lastly, sprinkle some onion on top of the bell pepper.
Repeat the layering steps, starting again with the sauce and finishing with the peppers.
Repeat this for all 4 of the ramekins.
Bake for 10-15 minutes covered loosely with foil. Finish uncovered for another 10 minutes. You can also microwave each ramekin in 30 second increments until heated through.