Pressure Cooked Chicken Curry ~gluten free

3lbs chicken pieces
2 tablespoons butter
2 teaspoons Curry powder
2 teaspoons salt
2 large onions, diced
1 teaspoon vinegar
1 cup water
2 tablespoons cornstarch
1/4 cup water
1 can green beans
Heat pressure cooker. Melt butter and brown chicken pieces in butter. Stir in onions and lightly brown. Stir in curry and salt. Add the vinegar and water. Close cover. Following manufacturers' directions, cook for 10 minutes (regulator should be rocking gently)
Cool pressure cooker at once (I place it under a tap of cold water until I hear the pressure release). Remove chicken pieces. Stir in the canned beans and the cornstarch mixed with 1/4 cup cold water. Bring to a boil, simmer 1 - 2 minutes.
Serve over hot rice. Makes 4 - 6 servings.