You have a few options: - Substitute brown rice for long-grain rice and cook for about 24 minutes. Brown rice cooks for much longer than white rice, so the meats and vegetables could get a bit overcooked. However, many of my readers do it and like it. - Use parboiled brown rice, and increase the original cooking time by a couple of minutes. - Another option is to reduce the quantity of liquid in the recipe, pressure cook everything but the rice for a couple of minutes, and stir in cooked brown rice at the end.