Mix pasta, water, and salt in a deep cereal bowl.
Microwave for 2 minutes.
Mix well and microwave for 2 more minutes (Check if it boils - if it boils over stop microwave immediately to stir)
Check to make sure there is enough water, add 1/4 cup water if it is dry.
Mix again and microwave another 2 minutes
Check for doneness here, microwave one more time if needed.
Add in the milk, cheddar cheese, meatballs, onion bell pepper mixture, and black pepper, stirring well.
Microwave for 1 minute until melted
If the cheese doesn’t melt all the way, you can microwave for 45 seconds stir again.
Top with American cheese and stir before serving.