Best way to add delivered foods

I recently started getting foods from one of those food delivery services. Rather than making a new food for each item, its there a way to make a "fake" entry that I can change the calories, carbs, fat, etc on for each meal? In other words, I have something now called "restaurant food" and I have it with 1 calorie. So when I add that, I can just change it to the right number of calories by changing the number of servings. But I would also like to change the carbs, proteins, etc for each meal.