Prepare these sandwiches up to six hours ahead. For a heartier option, add turkey, chicken, or prosciutto.
Toss together red peppers and garlic in a small bowl.
Spread cut side of top half of bread evenly with tapenade and cut side of bottom half evenly with goat cheese. Layer red pepper mixture and arugula over goat cheese. Place top half of bread, tapenade side down, onto red pepper and arugula layers. Cut into 4 pieces.