01 -
Cook rigatoni according to package directions until al dente. Drain and set aside.
02 -
In a large skillet over medium heat, brown the ground beef with salt and pepper, breaking it up as it cooks. Remove from skillet and set aside.
03 -
In the same skillet, sauté the sliced mushrooms, chopped bell pepper, and onion until softened, about 5-7 minutes. Add minced garlic and cook for another minute until fragrant.
04 -
In a separate saucepan, melt butter over medium heat. Whisk in flour to form a roux and cook for 1 minute. Gradually stir in milk, whisking constantly until the mixture thickens, about 3-4 minutes.
05 -
Remove the sauce from heat and stir in the provolone cheese until completely melted and smooth.
06 -
Add the cooked pasta, ground beef, and sautéed vegetables to the cheese sauce. Toss everything together until well coated.
07 -
Serve immediately, garnished with fresh chopped parsley for color and flavor.