Saute garlic in 1/2 tablespoon olive oil for 2 minutes. Cool. Marinate shrimp in half of the garlic oil mixtire for 30 minutes. Brush remaining oil on the bread.
Place corn (with husks intact), pepper and onion on oiled grill. Grill onion and pepper for 6-8 minutes and corn for 10 minutes until browned.
Grill shrimp 3-4 minutes per side, basting with barbeque sauce. Grill bread until toasted.
Line rolls with arugula. Top with half of the corn mixture, followed by the shrimp and remaining corn mixture. Drizzle with barbeque sauce...