Aji amarillo paste is available in Hispanic markets. One finely minced frozen aji amarillo, yellow mirasol or 1/2 habanero pepper may be substituted for aji paste. For less heat, remove seeds and ribs from peppers. Annatto seeds, also called achiote, are small, hard, dark red seeds from the annatto tree and are available in Hispanic markets. They are ground and used in spice pastes or dry rubs and impart a mild earthy flavor and golden to orange color to foods. If unavailable, 1/4 teaspoon turmeric may be substituted for the annatto oil to add golden color to the quinoa. Short ribs may be cooked on the stovetop. Cooking times for beef and papaya remain the same.