Grilled Vegetables and Tomato Bread

Name: Grilled Vegetables and Tomato Bread
Ingredients: 1 head garlic; 1 red onion, peeled and thickly sliced; Olive oil; 1 medium eggplant or 2 baby eggplants, purple or white; 2 zucchini, cut in half lengthwise; 2 yellow squash, cut in half lengthwise; 1 yellow pepper, seeded and quartered; 1 red pepper, seeded and quartered; 1 loaf of crusty bread; 1 tomato; 1 bunch arugula