Slice bacon into 1/3 -inch pieces ... to create an emulsified sauce. Toss in 1 cup cheese. Taste and add salt as needed. (If you are transferring to a baking dish, do so now.

Cook the Macaroni: Cook the elbow macaroni according to package instructions. Drain and set aside. Brown the Beef : In a large skillet, brown the ground beef with the diced onion over medium heat.