Make sure all ingredients are whole foods, are as natural as possible and have no artificial anything. Also that they are oil-free and sugar-free.
Any Plant-Based Milk: Almond, Soy, Hemp, and Rice
Fortified cereal Make sure it has added vitamins including B12.
Grains: Brown rice (can buy it pre-cooked and frozen at Trader Joe's), Quinoa, brown pasta, whole grain brown bread, brown pita bread.
Vegetables: Make sure you have some green leafy veg like Kale, Spinach, Broccoli (fresh including some that is pre-cut and frozen including frozen onions).
Fruits: Fresh, frozen and dried. Green apples, apricots, figs and Canteloupe melon are especially high in nutrients.
Nuts: Walnuts, almonds, cashews in particular are very nutritious, including the butters made from them.
Seeds: Pumpkin seeds, Sunflower seeds, Flax seeds and Hemp seeds, including the butters made from them.
Lentils: Dried or the pre-cooked ones found in Trader Joe's.
Beans: Dried or canned.
Sauces and Dips: Hummus, guacamole, salsa, marinara sauce.
Seasonings: Lemons, limes, soy sauce, tamari, nutritional yeast, balsamic vinegar, Braggs Liquid Aminos, Dijon mustard, garlic, ginger.