Eating calorie dense foods thinking that it would lead to weight gain is not correct. It will lead to fat accumulation at specific body parts, which in your case is tummy fat. You must:-
a) Set your metabolism levels right by following a strict dietary regime and setting your body clock right
b) Include foods that are nutrient as well as calorie dense
Next Steps
Include things like almond and banana shake in your diet, add dates to it. Add roasted sesame seeds to your vegetables. For more action points, you can contact me on direct consult or visit me to get a customised diet plan suiting your needs.