lettuce wraps

These were also very good, I made them Sunday night. They are similar to the lettuce wraps served at PF Changs.
The recipe:
1 head lettuce
1 lb ground pork or beef (I used pork)
1 T. cooking oil
1 large onion, chopped
2 cloves garlic, minced
1 T soy sauce
1/4 c. hoisin sauce (found on the oriental food aisle at the store)
2 t. ginger
1 T rice vinegar
1 (8 oz) can water chestnuts, drained and chopped
1 bunch green onions, chopped
2 t. soy sauce
Rinse lettuce and seperate leaves, pat dry being careful not to tear
In a medium skillet, brown meat in oil, stirring often. Drain, and set aside to cool. Cook the onion in the same pan, stirring frequently. Add the garlic, 2 T. soy sauce, hoisin sauce, ginger, and vinegar to the onions and stir. Stir in chopped water chestnuts, green onion, meat, and remaining soy sauce and cook until green onions just begin to wilt, about 2 minutes.
To serve, allow each person to spoon a portion of the meat into a lettuce leaf. Wrap the lettuce around the meat like a burrito.