Whisk marinade ingredients in a bowl.
Slice the chicken breast in half, pound to ½ inch thickness, and toss in marinade.
In a separate bowl, mix all slaw ingredients until well combined.
Grill chicken 5–6 minutes per side, or until fully cooked through.
Toast the buns and stir together spicy mayo.
Assemble sandwiches: bottom bun with spicy mayo, grilled chicken, slaw, then top bun.
