The thing that lets people create 1200 calorie monstrosities is what makes Chipotle my favorite fast food chain. No matter whether I'm trying to add or cut weight I always know that I can tailor a Chipotle meal exactly to my caloric & macronutrient needs. Both from the fact that the food is easy to customize as well as the fat that they have good calorie and macronutrient breakdowns of each ingredients.

Subway, for example, makes it tough to find info on individual ingredients. Some things need to be backed out by comparing, say, a roast beef sub vs a veggie sub to determine the stats on the roast beef individually so that you know what you're getting if you do double roast beef.