One Pot Cheeseburger Casserole


1 tablespoon olive oil
1 1/2 pounds ground beef
1 onion, diced
Salt and pepper, to taste
1 (28 ounce) can diced tomatoes, undrained
1 (8 ounce) can tomato sauce
2 cups chicken broth
1/4 cup ketchup
1 tablespoon Dijon mustard
1 pound rotini pasta
2 cups shredded cheddar cheese
1 Roma tomato, diced
2 green onions, sliced

Heat olive oil in a large stockpot or Dutch oven over medium high heat. Add ground beef and onion and cook until beef has browned, about 3-5 minutes, making sure to crumble the beef as it cooks; season with salt and pepper, to taste. Drain excess fat. Stir in tomatoes, tomato sauce, chicken broth, ketchup, mustard, pasta and 2 cups water. Bring to a boil; cover, reduce heat and simmer until pasta is cooked through, about 13-16 minutes. Remove from heat and top with cheese. Cover until cheese has melted, about 2 minutes. Serve immediately, garnished with tomato and green onions, if desired.