I was wondering the same thing. There are a lot of people on here who have had amazing weight losses on 1200 calorie diets. Someone on another thread said that her 1200 calories is way more nutrient rich than many others 2000 calorie diet. I always wondered what she was eating.
I have recently decided (after a 10 day - highly frustrating weight loss stall) that I am dropping my calories to 1200. (I already do low carb)
At 9 pm last night, I realized that I was only at 750 for the day and ate some tuna. I shouldn't say some, I should say huge amount of tuna. It was only 360 calories, 3 grams of fat, 6 carbs, and

78 grams of protein. After I ate that, I cannot even think about eating anything for a long time. So my total for the day was 1,116 calories and I wasn't hungry for a second.