Prep the Components : Carefully separate, wash, and pat dry 12 of the largest outer leaves from the head of butter lettuce; set aside. On your cutting board, dice the shallot, mince the garlic, grate the ginger, shred the carrot, chop the water chestnuts, and slice the scallions.
Craft the Savory Sauce : In the small mixing bowl, whisk together the reduced-sodium tamari, maple syrup, rice vinegar, toasted sesame oil, sea salt, and red pepper flakes. This flavor base is designed to deliver a rich taste with managed sodium, ideal for a DASH-friendly diet.
Brown the Chicken : Place the Dutch oven over medium-high heat and add the avocado oil. Once shimmering, add the ground chicken. Break it apart with a spatula and cook for 5–7 minutes, stirring occasionally, until browned and fully cooked to an internal temperature of 165 °F (74 °C). Drain any excess liquid and set the chicken aside on a plate.
Build the Aromatic Base : Return the Dutch oven to medium heat. Add the diced shallot and shredded carrot, sautéing for 3–4 minutes until softened. Stir in the minced garlic and grated ginger, cooking for another 90 seconds until fragrant.
Combine and Glaze : Return the cooked chicken to the Dutch oven with the aromatics. Pour the prepared sauce over the mixture. Stir to combine and allow the sauce to bubble gently and reduce for 3–4 minutes, creating a thick glaze that coats the chicken.
Final Add-Ins : Remove the pan from the heat. Fold in the chopped water chestnuts and sliced scallions. This step ensures they retain their refreshing crunch and vibrant flavor.
Assemble and Serve : Spoon approximately ⅓ cup of the chicken mixture into each prepared lettuce leaf. Garnish with a sprinkle of toasted sesame seeds, chopped cashews, and extra sliced scallions before serving immediately.