Ranch Style Lentil Casserole - cooking recipe

Ingredients

2 cups lentils
1 quart water
1 lb ground beef (optional)
1 cup catsup
1 (1 1/2 ounce) package onion soup mix
1 teaspoon vinegar
1 teaspoon prepared yellow mustard
1/8 teaspoon pepper
1 cup water

Preparation

Put lentils and 1 quart of water in a 3-quart pot; bring to a boil, then simmer for 30 minutes.
Brown ground beef, if using, and drain fat.
Stir all other ingredients into lentils (do not drain the lentils).
Pour into 2 1/2 quart casserole and bake uncovered at 400*F for 30 minutes.