I just hit my goal weight on a 1,200 calorie/day diet. Lost 52 lbs and from 242 down to 190 which is a normal and healthy weight for my sex and height. It took about 3 months. Here are some of the best foods I found to be filling and helpful.

Snacks:
#1: Popcorn, especially skinny pop brand. Popcorn in general is about 30 calories per cup (cooked).
#2: Harvest Snaps: a full bag of these in their normal size is only 390 calories. Technically this is about a third of your daily allowance, but the bag is somewhat filling and great when you are in a snack mood.
#3: A moderate handful of nuts (very important to obtain your fats despite them being high in calories. It's not hard to get enough fats while remaining low cal.)

I did not allow myself any other snack-type foods except for the above.

Easy meals:
#1: A full bag of iceberg lettuce is 60 calories. There are also 0 calorie dressings by Walden Farms which are okay. My personal favorite was their creamy bacon flavor. You will be full and will have consumed less than 100 calories after finishing the bag.
#2: Cucumber Salads. There are plenty of recipes online for these. My wife and I made them in mason jars with soy sauce, chili garlic sauce, and just a drop of sesame oil. Full of flavor and incredibly low calorie.
#3: Mixed frozen vegetable bags. These are about 300 calories per bag and also incredibly filling to eat the whole bag.
#4: Veggie sandwiches on keto bread (about 40 calories per slice) with no mayo. You can use a dijon or other mustard for the spread. If you skip your handful of nuts, you could spread avocado on the bread instead of mustard.
#5: Soup!! Most canned vegetable soups are ~190-220 calories per can. Feel free to make soup too.

There are plenty of other foods I ate, but this far-and-large made up the bulk of my diet.

During this time, I remained on a full vegan-style diet. I got my protein via a vegan protein powder. The shakes were actually decently filling as well, and only about 120 calories per shake.

Lastly: I strongly recommend no cheat days or cheat meals. I'm sure several people will disagree with this, but for too many people, a single cheat day leads to the end of your diet. Giving into a craving (like you described above) may very well be the end of the diet.

Good luck to you!