To prepare the marinade and dipping sauce: combine almond butter, soy sauce, vinegar, garlic and honey. Reserve and set aside ⅓ cup marinade for dipping. Place remaining marinade in a sealable container or bag along with chicken and mix to coat. Marinate for at least 2 or up to 48 hours in the refrigerator.
To cook chicken: remove chicken from marinade and thread onto skewers. Grill on high for five minutes per side or place under broiler for four minutes per side.
Serve with reserved dipping sauce. Top with scallions and/or almonds if desired.