You might have seen hurt/heal games elsewhere on the site, and this one works the same way: all the food and drink items start on 20 points, and each user has 5 points per day (UK time) that they can add or subtract from food items in any combination (e.g. you could add 5 to one item, subtract 5 from one item or add 2 to one item and subtract 3 from another). When a food item falls to 0 points, it is eliminated from the competition.
Not at all inspired by the results day breakfast buffet, I've chosen the breakfast foods and drinks below for the game. I've tried to include the relatively standard things you'd find on a breakfast buffet, but don't @ me if I've forgotten something!