Hamburger Vegetable Chowder

2 tablespoons oil or shortening
1/2 pound hamburger
1 cup canned tomatoes
1/2 cup diced carrots
1/2 cup diced celery
1 onion, chopped
2 teaspoons salt
1/4 cup uncooked rice
1/2 teaspoon pepper
1 1/2 cups water
1 cup cubed potatoes

Heat cooker. Add oil and brown meat. Add tomatoes, carrots, celery, onion, salt, rice, pepper, water and potatoes. Close cover securely. Place pressure regulator on vent pipe and cook 15 minutes with pressure rocking slowly. Let pressure drop of its own accord.

Source: Presto Pressure Cooker Cook Book