Step 1

Heat grill to medium.

Step 2

Slice each chicken breast in half horizontally into 2 evenly thick halves.

Step 3

Whisk together garlic, lime juice, and olive oil in a large bowl. Season to taste with salt and pepper. Add chicken and turn pieces to thoroughly coat. Let marinate 10 minutes, and up to 30 minutes, at room temperature.

Step 4

Meanwhile, make the peanut sauce.

Step 5

In a food processor or blender combine all ingredients and process until smooth, adding more water if needed to thin.

Step 6

Grill chicken until browned and cooked through, 2 to 3 minutes per side.

Step 7

Transfer chicken to a platter. Spoon peanut sauce over the chicken and sprinkle with cilantro, if desired. Offer remaining peanut sauce on the side.