Burger in an onion ring roll

500 g chicken mince 2 large onions, sliced into thin rings 150 g grated mozzarella 4 slices cheddar 1 small iceberg lettuce 2 medium tomatoes 2 tbsp mayonnaise 1 tbsp mustard 1 tbsp honey 1 tsp sweet paprika ½ tsp garlic powder 1 tsp oregano salt pepper