1. Preheat oven to 350°F. Place bread cubes in single layer on baking sheet. Bake 15 minutes or until toasted. Cool slightly.
2. Meanwhile, mix vinegar, oil, garlic, salt, basil, mustard and red pepper in medium bowl with wire whisk until well blended. Set aside.
3. Mix bread, kidney beans, mozzarella, bell pepper and onion in large bowl. Add dressing; toss to mix well. Let mixture stand 30 minutes to 1 hour, tossing occasionally. Serve over field greens.