Place chicken in a large zip top bag. Gently pound chicken out to a uniform thickness.
Combine juices, canola oil and garlic and pour over chicken. Toss the juiced fruit in the bag with the marinade, if desired. Marinate in the refrigerator for 2 hours or more.
When ready to cook, season both sides of the chicken with salt and pepper. Discard the marinade.
For outdoor grilling - Cook chicken for about 3-4 minutes per side over medium-high heat, or until the juices are clear.
For indoor cooking - sear chicken in an oven proof skillet over medium-high heat for about 3 minutes per side. Finish cooking in a 400 degree oven; about 8-10 minutes. (you could also cook completely on the stove top, but finishing in the oven helps to prevent burning and seal in the moisture).