I don't have a recipe but this is what I would do given your description of the dish, except that I didn't add rice here -- I've never encountered rice mixed in chowmein (which literall means stir-fried noodles in Chinese):
1. Saute some crushed garlic and onions.
2. Add chicken strips, soy sauce, oyster sauce, good chicken stock, then sliced carrots and chopped celery stems/leaves. (Add shrimps, pork strips and sliced chinese sausages for better taste. You can also add lots of chives.) Simmer until cooked and adjust seasonings to taste.
3. Ladle out all solids and enough liquid for topping noodles later. (You must have enough remaining stock simmering in your wok to be absorbed by the noodles.)
4. Add noodles until cooked. Place noodles in serving platter.
5. Return reserved toppings into wok and bring to a boil.
6. Add slurry of cornstarch while stirring. When cornstarch all cooked and combined and you get the right consistency of the topping liquid, pour everything over the noodles. Serve while hot.
Note: Use the best quality chowmein noodles you can find. It's flavor and texture adds greatly to the overall taste of the dish.