Beef and Vegetable Stir-Fry

1 lb. beef, sliced
1 crushed clove of garlic
1 medium onion, sliced
vegetables (broccoli, carrots, peas, bell peppers)
1/2 c. walnuts or water chestnuts

For marinade:
1 t. cornstarch
1 t. salt
1/2 t. sugar
2 T. soy sauce
2 T. cooking wine

Saute garlic in oil. Add vegetables (I just happened to have bell peppers in 4 different colors)and onion slices and saute until tender crisp. Set aside. Add more oil to the pan and fry meat until browned on all sides. Add nuts and cook another minute. Add marinade and stir until thickened. Then add vegetables and heat through. Serve over rice.