Mince 2 garlic cloves. Peel and mince a 2-inch piece of ginger until you have 2 tablespoons. Coarsely chop 1/2 cup toasted cashews and 1/3 cup fresh cilantro. Remove 10 leaves from 1 head butter lettuce.
Heat 1 tablespoon toasted sesame oil in a large skillet over medium heat until shimmering. Add the garlic and ginger and cook until fragrant, 2 to 3 minutes.
Add 1 pound ground turkey and cook, breaking the meat apart with a wooden spoon into small pieces, until cooked through and browned, 4 to 6 minutes.
Add the cashews, 2 tablespoons hoisin sauce, and 2 tablespoons soy sauce. Remove from the heat and stir in the cilantro.
Divide the mixture onto the lettuce leaves and serve immediately.