Lettuce Wraps a la P.F. Chang's

With P.F. Chang's in walking distance from our apartment, it's always tempting to go get my favorite dish, their chicken lettuce wraps. Unfortunately, going out to eat all the time is not cheap, and it's usually not healthy, so I came up with this alternative.

Lettuce Wraps
makes 4 servings

1 lb of ground chicken or pork
1 large onion, diced
1 can of water chestnuts, diced
2 handfuls of bean sprouts, chopped
3 eggs
1/4 cup soy sauce
2 tsp sesame oil
1 tsp rice vinegar
2 tbsp peanut butter
1/4 cup orange juice

1 head of iceberg lettuce

Scramble 3 eggs in a lightly oiled pan. Remove from the pan and set aside in another dish.
Saute diced onions the pan until softened. Add ground meat and cook on high heat until fully cooked, mixing constantly. Add diced water chestnuts, chopped bean sprouts, and cooked eggs, mixing constantly until thoroughly heated. Add soy sauce, peanut butter, rice vinegar, and orange juice to mixture. At the last minute, add sesame oil.
Cut head of lettuce in half, and separate leaves. Serve meat mixture with lettuce cups (and if you have it, some Sriracha).