Keep in mind that amounts and foods will vary not only from surgery type to surgery type, but from person to person as well.
I'm 8 years post-op from the DS, and effortlessly maintaining a loss of 170 pounds. A typical breakfast for me would be something like 6-8 slices of bacon, a couple of scrambled eggs, and a tomato, or an omlet made with 2 eggs, 2 oz. of sausage, three slices of cheese, and onions, peppers, and tomatoes.
Typical lunch would be a sandwich, heavy on the meat and cheese. Maybe a bacon cheeseburger, or some chicken fingers with a salad.
Mid-afternoon snack would be something like a couple of sticks of string cheese, nuts, or, if I've got it, a hunk of some kind of meat. (My favorite!)
Dinner would be 6-8 ounces of some kind of meat, fowl, or seafood, with a small salad, a few bites of potato, maybe a yeast roll. Dessert if I'm not full.
Evening snack would be about the same as the afternoon snack.
On an average day, I eat around 2500-300 calories, with it coming mostly from protein and fat.