I use the 5:2 diet, and in all honesty on the "starvation" days (500 cals if I remember...that's what I base mine on), I find more than enough extremely low calorie foods in the salad department...you can eat a whole bag of salad leaves for 10 calories, no carbs, a whole cucumber, 10 calories, no carbs, tomatoes, beetroot, peppers (any colour), radishes...if you put a good portion sized mix of that lot in a bowl with some herbs (basil, thyme, mint, oregano, coriander and some black pepper) give it a good mix, and add a couple of boiled eggs, you have a filling meal for about 150 calories, and then for another meal, you could do something like a steamed bit of fish, chicken or even a quorn fillet on a bed of kale, with two serving spoonsfuls of mixed vegetables. A whole bag of chopped kale is only 10 calories, no carbs. Michael Mosley also has a 5:2 diet book with some superb recipes. I don't do my two days together unless my calander is too busy. I usually do 3 days normal, one day "starvation", I find it works better, is more of a routine, and if you have broken the routine because of illness or holiday or family commitments, it is easier to pick up 3 days ?normal and 1 "starvation". Remember you are looking at the nutritional value as well as the carbs and cals.