Add cheese on top or inside of things and the taste is improved and the calories go up: a cheese omlette, grated cheese in salads, cheese in or on burgers and meatloafs, cheese or cheese sauce on chicken and fish.
We have just the opposite problem. When I did my daughters meals on fitday we were way over the 10x rule. I cant cut much out either. Breakfast: eggs with something. Lunch: salad with dressing and sliced chicken(usually with shredded cheese too), with a side of celery or cucumber Snack: nuts, or celery and cream cheese, or cold meat, or almond pancakes Dinner: chicken/fish/ ground turkey, salad, cooked veggie. Most days just that is 1600-2000 calories!