We want to draw a loop in the grid, where the costs of the foods we pass through sum to exactly $200. The main deduction is that the loop can't pass through any of the nine numbers with units digit 3, because then the final sum won't have units digit 0. To get the answer, we take the 7 initial letters of the foods in the loop, in order.
Farid originally had an idea similar to this for the prepuzzle.
Also, as a logic puzzle purist, I made the locations of foods in the grid symmetrical.
This made puzzle construction a lot harder, but it was worth.
The foods in the grid are taken from real CMU menus. Yes, including "Aquafina" (from Au Bon Pain's menu).