Open-face Provenal vegetable sandwich

Combine mushrooms, zucchini,bell pepper,onion,broth,oil,jalapeo pepper,capers,1 tablespoons oil, garlic,oregano,salt and black pepper in crock-pot slow cooker. Cover;cook on low 5to 6 hours

Turn off heat. Stir in vinegar and remaining 1/2 tablespoon oil. Let stand uncovered,15 to 30 minutes or until vegetables absorb some liquid. Season with additional salt and black pepper if desired.

Spoon vegetables onto bread. If desired,sprinkle each serving with 2 tablespoons mozzarella cheese and broil 30 seconds or until cheese is melted.