Be sure you're adding fat to your meals. In general pick one or two options from the meal template in addition to any oil you cook in.
Also, remember that it is okay to have starchy vegetables like potatoes, sweet potatoes, carrots, parsnips, beets, turnips, rutabagas, butternut or acorn or other winter squashes. Most people do well with a fist-sized serving at one meal a day, but people who are very active, who are prone to depression or anxiety, or women who are nursing, pregnant, or in the week or so leading up to their period often need more.
You shouldn't depend on nuts or seeds as your main fat source, but you can occasionally add them for a little crunch. For instance, add pecans or walnuts in a chicken salad, make something like these green beans, or just top your food with your favorite toasted nuts.
Commercially prepared chips are out, but you could make your own kale chips or zucchini chips or really chips from whatever vegetable you like by baking them in the oven -- google for instructions and just be sure you use compliant seasonings and oils.