Food Network teaches how to crush, slice and mince garlic. Peel off some of the papery skin from the garlic and then smash the head of garlic with the heel of your hand to loosen the cloves; if you only need a few cloves, leave the head intact and pull some off. Separate the cloves. To peel a clove, cut away the root end with your knife. Lay the flat side of the knife over the clove while holding the knife handle, then with the heel of your free hand carefully whack the knife against the garlic to separate the skin from the clove. To crush the peeled garlic, lay the flat side of the knife over the clove and smash it again. To slice peeled garlic, lay the clove flat on the cutting board and hold it with the fingertips of one hand, keeping them curled under. Using a rocking motion with the knife, make thin slices by moving the knife slowly across the clove. To mince peeled garlic, lay the flat side of a knife over the clove and smash it. Roughly chop the clove then move your free hand flat across the tip of the knife and use a rocking motion to chop the garlic until it’s finely minced.
Remove tough stems from mushrooms and brush with damp towel to clean, Slice mushrooms. Chop chicken into small pieces.
Preheat a large skillet or wok to high.
Add oil to hot pan. Add chicken to the pan and sear meat by stir frying a minute or 2. Add mushrooms and cook another minute or two. Add salt and pepper to season, then garlic and ginger. Cook a minute more. Grate zest into pan, add bell pepper bits, chopped water chestnuts and scallions. Cook another minute, continuing to stir fry mixture. Add hoisin Chinese barbecue sauce and toss to coat the mixture evenly. Transfer the hot chopped barbecued chicken to serving platter and pile the quartered wedges of crisp iceberg lettuce along side. Add wedged oranges to platter to garnish. To eat, pile spoonfuls into lettuce leaves, wrapping lettuce around fillings and squeeze an orange wedge over.