A magic one!
Don't eat concentrated proteins and carbohydrates at the same meal. Eat starchy carbs like rice, corn, potato, bread and pasta, ( if you eat it ), with non-protein sauces, accompaniments, etc like salads, veg, fruit, creamy buttery spicy things, beans/lentils/chickpeas, etc, ... and eat concentrated proteins like egg, cheese, fish, meat, and soya, ( if you eat it ), with veg, salad, oils/fats, and fruit.
I have found over and over again that I can eat almost any amount of food if I follow that one rule, ( and it also seems to protect me from colds ).
Excluding gluten works too, if you are gluten-sensitive. Weight falls/melts off at an extraordinary rate.
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