Serve tonight: Combine first 4 ingredients in a gallon resealable freezer bag; seal. Place bag in a shallow dish and refrigerate 30 minutes or up to overnight.
Preheat grill to medium. Remove tenderloins from bag; discard bag with marinade. Place tenderloins on coolest part of grill. Grill, turning once, until internal temperature reaches 165°, about 15-20 minutes.
Remove from grill; slice tenderloin and serve over a bed of lettuce with your favorite toppings and dressing. Makes 6 servings.
Serve with garlic breadsticks.
Freeze for later: Combine first 4 ingredients in a gallon resealable freezer bag. Seal well, label and freeze. Thaw completely. Prepare as directed above.