Slice bread into 1-inch slices and then cut into bite size pieces. Alternate bread, tomatoes and mozzarella cheese on skewers.
Combine oil, sweet basil and garlic in a small bowl. Brush over skewers, turning to coat both sides. Grind peppercorns and sea salt over the skewers.
Grill on high heat 1 to 2 minutes until bread is toasted. Turn and grill on other side 1 to 2 minutes. Serve immediately.
Note: If using bamboo skewers, soak in water for at least 30 minutes prior to use.