chop up the onion, ham and bacon. fry them up all together. you won't need oil because the bacon is greasy enough

once the bacon gets fried through, and the onions are glossy, add the garlic and let fry for another five minutes

put the heavy whipping cream and half & half. let boil. stir often

add the cheese slices when its boiling. stir often

add your salt & pepper and let it cook on low while you make your noodles. when the sauce thickens, it will be done. if it doesn't thicken quick enough, mix flour and water together to make a pastey consistency, and add while stirring quickly.