Fire-Grilled Fajita Casserole

Ingredients

• 1 medium onion
• 1 red pepper
• 1 yellow pepper
• 1 tablespoon fajita seasoning
• 1 pound shredded roasted chicken or rotisserie
• 1 (16-ounce) can baked beans, such as bush's baked beans with onion
• 2 cup cooked farro or quinoa
• 1 cup grated cheese
• jalapeño and cilantro chopped, optional