1. To make Roasted Vegetables: Preheat oven to 375°F. Stir together cumin, coriander, salt, and pepper in small bowl. Set aside.

2. Toss together zucchini, bell peppers, onions, and oil in large bowl. Add cumin mixture, and toss to coat.

3. Divide vegetables between 2 baking sheets, and roast 30 to 45 minutes, or until tender and golden brown, turning vegetables once or twice and rotating baking sheets from top to bottom. Cool.

4. To make Bean Spread: Heat oil in small skillet over medium heat. Add garlic, and cook 30 seconds to 2 minutes, or until translucent and fragrant. Add beans, and coarsely mash. Stir in 3/4 cup water, and cook 10 minutes, or until mixture is consistency of refried beans, stirring occasionally. Stir in lemon juice, and cool.

5. To assemble Sandwiches: Spread 2 Tbs. Bean Spread on each bread slice. Top 4 bread slices with 1 cup Roasted Vegetables, 2 or 3 tomato slices, and 1/2 cup arugula. Place remaining 4 bread slices on top. Cut in half to serve.