How to draw a burger depends on the ingredients.
A good burger should have something moisture, salty, and filling inside. It's better to draw a burger from top to bottom because in the drawing, the upper elements overlap the lower ones. It's better to cook from bottom to top.
On top is a round bun, underneath are pickles for moisture, then any meat of your choice covered with cheese for satiety. We'll put lettuce under the patty to prevent the juice from soaking the bottom bun. That's the burger we've got.