Chinese Fried Rice

4 cups cooked white rice -- cold
3 large eggs -- beaten
4 each green onions -- sliced
2 large mushrooms -- sliced
6 ounces cocktail shrimp
3 stalks celery -- sliced on the diagonal
1 teaspoon salt
1/2 teaspoon pepper
1 cup ham -- diced
4 tablespoons soy sauce
1/2 teaspoon MSG -- optional
6 tablespoons vegetable oil -- divided

Heat 1/2 of oil in wok and scramble eggs until done, Cut eggs into small pieces and set aside. Heat more oil and stir-fry meat (ham or chicken), shrimp, mushrooms, celery and onions for 1 minute. Add rice, eggs and seasonings. Stir-fry until rice is hot. Serve with additional soy sauce.