Herb and Mushroom Rice

1-1/3 cups chicken stock
1-1/4 tsp. parsley flakes
1-1/4 tsp. minced onion
1/4 tsp. oregano leaves
1-1/3 cups instant rice, uncooked
2 tsp. unsalted butter
3 ounces canned sliced mushrooms, drained

Bring first 4 ingredients to a boil in a heavy non-reactive saucepan over high heat.

Stir in remaining ingredients.

Cover and remove from heat, let stand 5 minutes.