Eat everything that has a high calorie count, but try to stay as healthy as possible. Here are foods that helped me:
1. High Protein, Vitamin, & Amino Acid Smoothies ( have these at least 2x a week )
2. Eat Butters: Peanut Butter, Almond Butter, Cashew Butters, etc., often
3. Eat lots of chicken & fish ( at least 3-4x a week )
4. Use a lots of Olive oils in your dishes
5. Dont skip any meals and have a snack in betwen meals, as well as some dessert after dinner