beef stew in the pressure cooker

Name: Beef Stew in the Pressure Cooker
Prep time: 15 min
Cook time: 15 min
Yield: 4
Ingredients: 1½ lbs. beef stew meat; 3 tblsp. oil; 2 large potatoes; 4-5 large carrots; 1 large onion; 1 can green beans with liquid; 2 cans diced tomatoes with liquid; Salt; Pepper; 2 tblsp. cornstarch; ⅓ cup cold water