Big Easy Chicken Sandwiches — Robert St. John

Ingredients

• 6 5-6 ounce chicken breasts, boneless, skinless
• 1/2 cup no-stick grilling marinade for poultry (page xxx)
• 2 tsp poultry seasoning
• 2 Tbl unsalted butter
• 3 cups sliced mushrooms
• 1 tsp salt
• 1 tsp fresh ground black pepper
• 6 1-ounce slices cheddar cheese
• 6 1-ounce slices Monterey jack cheese
• 1 recipe caramelized onions, hot (page xxx)
• 10-12 fresh tomato slices