Delicious and bursting with flavor, Asian lettuce wraps are a great idea for entertaining or a family style meal. Each person can build their own fresh, delicious wrap. Just be sure to have plates or napkins available since the mixture can sometimes drip a little. 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 and enjoy!
Rinse whole lettuce leaves and pat dry, being careful not tear them. Set aside.
Heat a large skillet over medium-high heat. Cook and stir beef and cooking oil in the hot skillet until browned and crumbly, 5 to 7 minutes. Drain and discard grease; transfer beef to a bowl. Cook and stir onion in the same skillet used for beef until slightly tender, 5 to 10 minutes. Stir hoisin sauce, garlic, soy sauce, vinegar, ginger, and chile pepper sauce into onions. Add water chestnuts, green onions, sesame oil, and cooked beef; cook and stir until the onions just begin to wilt, about 2 minutes.
Arrange lettuce leaves around the outer edge of a large serving platter and pile meat mixture in the center.