In a large skillet heat oil over med-high heat. Add beef and onion, stir fry 2-3 minutes. Add peppers and continue to cook and stir 2-3 minutes. Stir in water and red wine or orange juice, sauce mix, orange rind, and oregano. Bring to boil, stirring constantly. Reduce heat, cover and simmer for 5 minutes. Serve on couscous or rice, garnish with chopped parsley.