Increase the heat to medium-high and add the ground chicken to the skillet. Cook for about 6-8 minutes, breaking it apart with a spatula, until browned and cooked through.
Stir in the diced red bell pepper and cauliflower rice. Cook for an additional 3-4 minutes, allowing the vegetables to soften and the cauliflower rice to warm through.
Mix together the soy sauce, Sriracha sauce, and sesame oil in a small bowl. Pour this mixture over the chicken and veggie mixture in the skillet. Stir to combine and cook for another 2 minutes to heat everything through. Season with salt and pepper to taste.
Spoon the chicken mixture into the individual lettuce leaves, creating wraps. Top with sliced green onions and a sprinkle of sesame seeds.
Enjoy the chicken lettuce wrap bowls immediately while the filling is warm.
Notes
Chop vegetables finely for even cooking. Adjust spice levels to taste.