1 pound ground beef
1 envelope chili seasoning mix
1/2 cup chopped onion
1/2 cup chopped green bell pepper
1 (16 ounce) can diced tomatoes
3/4 cup water
2 cups elbow macaroni, cooked and drained
1/2 cup shredded Cheddar cheese
Brown ground beef in a large skillet; drain. Add next 5 ingredients and bring to a boil. Reduce heat and simmer 15 minutes.
Add cooked macaroni and simmer another 5 minutes. Sprinkle with cheese before serving.