Protein is the only goal you want to meet, you do not want to lose the muscle you already have. Protein is filling and low in calories for the most part.

Especially Chicken, so filling and so lean that it's the perfect blank canvas to adjust to what you want. You can add fat to it via olive oil or butter in moderation to make sure you're still at a calorie deficit you can pan fry it, bake it, chop it up into a stir fry with veggies.

Lots of examples for filling meals thatll leave you full and feeling like you ate too much but in reality you're well below your daily calories and virtually no carbs leaving you to indulge on wasting your remaining daily carbs on things you like