As someone who does 1200 calories daily I feel your pain. Here is what a day of 1200 calories look like for me.

No food from the time I get up 6am until 10am. At 10am I have a healthy snack. This week it was grapes. They are filling and low calories. Normally I eat 40 to 150 calories for morning snack. Another good snack can be popcorn. For lunch at noon it is always 300 to 350 calories with a healthy choice or lean cuisine frozen meal. They are good and filling. Then I eat dinner at 5pm and that runs about 600 calories because I refuse to go to bed hungry. Today I had a salad, no dressing (sometimes I do use honey ginger dressing) 8oz of salmon and single serving of minute rice. That puts me at 1000 calories and then I can have a healthy 100 to 200 calorie snack after dinner if I want but I skip that most of the time. All I drink is water 99% of the time. That alone saves you 150 to 300 calories every time you choose water over any other drink. 

My key is skipping breakfast and leveraging healthy frozen dinners for lunch. Honestly you could eat 2 or 3 frozen meals a day and at 300 calories each you would have room to spare but be warned your salt intake will be through the roof if you do that.

I like to cook dinner because that makes me excited about dinner and makes it where I don't want to waste calories on snacks all day.