Adding snacks to your diet can help you gain weight, but it's important to know which types of snacks are good for you. There are many nutritious options out there, so it's hard to pick just one. But there are a few foods that are high in protein and contain some essential vitamins and minerals. These foods include peanut butter, oatmeal, cashews, dried figs, and bananas. Medjool Dates Aside...