翻译食谱：California Burger California Burger Ingredients and MetricProcedure Hamburger patty, 4 oz (110g) 1 Hamburger roll 1 Butter Needed Mayonnaise 10g Lettuce leaf 1 Thin slice of onion 1 (optional) Tomato slice 1Cook the hamburger patty on griddle or grill to desired doneness. While the meat is cooking, prepare the roll. Butter the bottom half very lightly. Spread the top half with mayonnaise. Place the two halves of the roll side by side on a serving plate. 4．On the top half, place the lettuce leaf, the onion slice (if used) and the tomato slice. 5．When the hamburger patty is cooked, place it on the bottom half of the roll. Serve immediately, open faceD、