Beef Broccoli Noodle Stir Fry

Name: Beef Broccoli Noodle Stir Fry
Ingredients: 2 tbsp oyster sauce; 1 tbsp chili garlic sauce; 1/4 tsp salt; 1/4 tsp black pepper; 1/2 cup water For Beef; 1 lb flank steak thinly sliced; 4 cloves garlic minced; 1 tbsp cornstarch; 1 egg yolk; 1/4 tsp black pepper For Stir Fry; 2 tbsp peanut oil; 1 onion sliced; 3.5 oz shiitake mushrooms sliced; 1 red bell pepper sliced into thin strips; 10 oz broccoli florets cut into small bite-size pieces, about 4 cups; 1/3 cup water; 20 oz udon noodles cooked *