1 pound sirloin steak, thinly sliced
1 tablespoon sriracha sauce
1 tablespoon soy sauce
1 garlic clove, minced
1 teaspoon grated fresh ginger
1 tablespoon vegetable oil
1 small onion, thinly sliced
12 lettuce leaves
1 cup cilantro leaves
1/2 cup dry-roasted peanuts, chopped
In a large bowl, toss the steak with the sriracha sauce, soy sauce, garlic and ginger.
Heat the oil in large skillet over medium-high heat. Add the onions and cook, stirring occasionally, until softened, about 5 minutes. Transfer the onions to a plate.
Add the steak, along with the marinade mixture, to the same skillet and cook, stirring occasionally, until the meat is browned, about 5 minutes.
Put the onions back in the skillet and cook, stirring, until heated through, about 2 minutes more.
To serve, divide the steak mixture equally among the lettuce leaves and top with cilantro and chopped peanuts.