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Export 9 ingredients for grocery delivery
Preheat air fryer to 375°. Combine mayonnaise and mustard; spread over 2 bread slices. Layer with cheeses, onion, tomato and bacon; top with remaining bread. Spread outsides of sandwiches with butter., Place sandwiches in a single layer in air fryer. Cook until cheese is melted, 2-3 minutes on each side.