I had that issue and solved it with high-satiety-low-calorie foods like mashed potatoes and rolled oats. 1 cup/80 grams of rolled oats is only 300 calories and

I had that issue and solved it with high-satiety-low-calorie foods like mashed potatoes and rolled oats. 1 cup/80 grams of rolled oats is only 300 calories and is very filling. 3 cups a day would only be 900 calories and be extremely filling.