In a glass measuring cup, squeeze
limes, yielding ¼ cup of juice. Add the garlic, pepper, olive oil, and cilantro and
stir.
Place the shrimp in a medium bowl
and pour the cilantro lime marinade over the shrimp. Let the shrimp marinate for 10
to
15 minutes in the refrigerator.
Alternate putting cherry tomatoes,
mushrooms, and shrimp on 4 skewers. Preheat the grill to medium heat. Grill the skewers
for 3 to 4 minutes on each side until the shrimp are just cooked through.