Fill a Ziploc bag with one cup water. Place skewers in the bag and soak for at least one hour.

Measure all the marinade ingredients into a medium bowl. Mix well until combined and set aside.

Slice each strip steak in half lengthwise, for a total of eight 4-inch (10-centimeter) strips. Cut each chicken cutlet in half widthwise, for a total of eight narrow strips. Slice each mushroom into six slices, for a total of 18 slices.

Thread each piece of chicken, mushroom, and steak onto its own skewer. Lay flat in a single layer in a medium-sized roasting pan. Pour marinade over the prepared skewers. Allow to marinate for 30 minutes to an hour, turning occasionally.

Spray a grill pan with cooking spray and preheat to medium-high. Grill the skewers for three minutes on each side, or until done.

Heat oil over low heat. Add garlic and sauté till light and fragrant.

Remove from heat and stir in peanut butter until smooth and melted.

Add remaining ingredients and return to heat. Stir until completely smooth and warmed through.

Arrange skewers on a serving platter and drizzle with peanut sauce. Serve with additional sauce.