Need food ideas to help gain weight

Qu

I need recipes for a picky eater, I am losing so much weight and I need food that will make me gain weight. Or something like a vitamin that will help with a fast metabolism

(Allergic to) mushrooms

(Vegetables) I don’t like onions, tomatoes,brussels sprouts, squash, zucchini, eggplant, spinach, cauliflower, asparagus

(Fruit)I don’t like avocados, pears, blueberries, cantaloupe, peaches,

(Meats) I don’t like, sea food