1 package (81/2oz) cornbread mix plus ingredients to prepare
6 green bell peppers
1 large onion, thinly sliced
1 tsp olive oil
1 can (16oz) no-salt-added diced tomatoes, drained
1 package (10oz) frozen corn, thawed and drained
1 can (21/4oz) sliced black olives, drained
1/3 cup raisins
1 tbsp chili powder
1 tsp ground sage
1 cup (4oz) shredded reduced-fat Monterey Jack cheese, divided
Cherry tomato halves and fresh herbs for garnish (optional)