Johnny Marzetti Casserole

2 pounds ground beef
2 cups chopped celery
2 cups chopped onion
1 cup chopped green pepper
1 (16 ounce) package wide flat noodles

Saut? ground beef, celery, onion and green pepper together. Cook noodles as directed. Mix meat and noodles and add:

1 (10 ounce) jar salad olives (broken pieces), juice and all
1 small can tomato paste
1 can tomato soup
1 (8 ounce) can tomato sauce
1 package spaghetti sauce mix, mixed as directed on package
1 (4 ounce) can mushroom pieces and stems

Mix all together and turn into lightly greased pan. Cover with one pound grated Cheddar cheese. Bake uncovered at 375 degrees F for 30 minutes.