01 -
Boil elbow macaroni in a large pot of water for 9 to 10 minutes until al dente. Drain and set aside.
02 -
Return pasta pot to stove over low heat. Stir in butter until melted, then add evaporated milk and warm until just below boiling. Incorporate shredded cheddar and Colby Jack cheeses, stirring until fully melted and creamy.
03 -
In a skillet over medium-high heat, brown ground beef with diced onions and bell peppers until meat is cooked through. Drain excess fat, then season with Italian seasoning.
04 -
Add drained diced tomatoes and pasta sauce to the skillet. Reduce heat and simmer gently for several minutes, then remove from heat.
05 -
In a casserole dish, layer half of the macaroni and cheese mixture followed by half of the meat sauce. Repeat layers, then top with remaining shredded cheese.
06 -
Bake uncovered at 350°F for 15 minutes. Broil for an additional 2 to 3 minutes until the cheese topping is golden brown. Let rest for 10 minutes before serving.