Even when having the ingredients you have to take care that lights are probably warm and if you aren't quick the salad of your nicely setup burger might lose it

Even when having the ingredients you have to take care that lights are probably warm and if you aren't quick the salad of your nicely setup burger might lose its structure and color and the sauce and grease might start flowing. But of course: producing good mockups isn't cheap either. In the end it will always have to pick between picking the proper ingredients, some mockups and Photoshop. And as they tell: Point is that one can see what's inside and nobody seriously expects the delivered fast food product to match the picture. (If there's a tomato on the picture however I hope there's a tomato slice somewhere on the real thing)