Get a pack of mini pizza base. If not available, use normal pizza base and cut roundels using a jar cap.

Add pizza sauce or tomato ketchup on the bases and coat evenly

Add 1 slice each of tomato and onion onto the ketchup coated base

Add seasoning of your choice. I added oregano

Add cut pieces from slices of cheese on each of the base

Add capsicum slice or chilli and use a toothpick if needed to hold in place