Prepare your ingredients: First, finely dice your onion, mince the garlic, grate the ginger, and drain and dice the water chestnuts. Separate the lettuce leaves gently, washing and drying them thoroughly.

Cook the turkey: Heat the olive or sesame oil in a large skillet or wok over medium-high heat. Add the ground turkey and cook, breaking it up with a spoon, until it is browned and cooked through, about 5-7 minutes. Drain any excess fat.

Sauté aromatics: Next, add the diced onion to the skillet with the cooked turkey. Sauté for 3-4 minutes until softened. Stir in the minced garlic and grated ginger, cooking for another minute until fragrant.

Add crunch and sauce: Incorporate the diced water chestnuts into the turkey mixture. In a small bowl, whisk together the soy sauce, hoisin sauce, rice vinegar, and Sriracha (if using). Pour the sauce over the turkey mixture in the skillet.

Simmer and combine: Stir everything well to combine, ensuring the turkey is fully coated with the delicious sauce. Let the mixture simmer for 2-3 minutes, allowing the flavors to meld and the sauce to slightly thicken.

Assemble your wraps: Finally, spoon the warm ground turkey filling into individual lettuce cups. Garnish with sliced green onions and a sprinkle of sesame seeds. Serve immediately and enjoy your ground turkey lettuce wraps!