In a medium mixing bowl, whisk together cashew sauce ingredients until well incorporated. Set aside.
Heat canola oil to medium-high heat in a large skillet. Add chicken and cook 2-3 minutes. Stir in coleslaw mix and cook 5-6 minutes, until cabbage is wilted and chicken is fully cooked and browned.
Season with a generous pinch of salt and pepper. Stir in cashew sauce and simmer 2-3 minutes, until thickened. Remove from heat. Place lettuce cups on a plate. Spoon chicken mixture into each cup and garnish with cilantro, cashews and Sriracha.
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