billies billy conserved-heat container convenient cooking-device durability durable economical efficient fuel-minimises fuel-minimizes handles heat-loss-minimised heat-loss-minimized heat-retention ice-cooler inner-pots insulated insulation keeps-flavour less-evaporation lids non-electric pan picnics portable portable-oven pot pots retained-heat retains-nutrients rice-cooker safe safer sauce-pan slow-cooker spill-proof stainless-steel strong thermal-cooker thermal-cooking thermal-insulation thermos-vacuum travel vacuum-cooker vacuum-flask water-saver zero-energy-use brazier breakfast close-up cooked cooking Dinner Domestic Kitchen eat egg yolk eggs falling fat food fried heat ingredient preparation preparing food raw refreshment scrambled eggs tofu Traditional Culture yellow barbecue bbq beef bulette burger delicious fagot frikadelle frying grilled ground meat hamburger kitchen lunch meal meat meat ball meatball mince minced meat rissole snack stove tasty traditional basic batter bubbles bubbling common cook edible flapjacks flat-cake flatbread frying-pan frypan global golden griddlecakes hotcakes international Pancake pumpkin soft surface surfaced surfaces surfacing textures thin touch warm warming warming-up beef olive beef rolls cooking fresh flesh fry kettle meat rolls meaty onion protein recipe roasting rolled beef rolls rosemary roulade sirloin sirloin meat spice