There are many easy options out there. The important thing is that she is getting a variety of foods. Plenty of fruits and vegetables, various grains, and protein foods such as legumes or products made from them such as beans, lentils, peas, chickpeas, tofu and tempeh, nuts and seeds. You can add nuts and dried fruit to any hot or dry cereal. Nut butters such as almond butter, sunflower seed butter or peanut butter on a good whole grain bread. Quinoa is an excellent grain choice, it is fast cooking and unlike most other grains it is a complete protein - You could add some finely chopped vegetables to cook along with it or use frozen veggies in a pinch. Although it is healthiest to use soaked dry beans and legumes you can used canned organic as a quick meal option - add some chili powder and chopped green onions for extra flavor. Beans and rice in a whole grain tortilla with sprouts and mixed greens are a great healthy meal. Smoothies are great too I use 3 bananas, a bag of frozen fruit, coconut milk and sometimes almond butter in mine. Veggies dipped in humus makes a great snack - you can by packaged humus at most grocery stores in the refrigerated section. Use whole wheat or brown rice pastas. Add finely chopped tofu to any sauce for extra protein - it is not necessary that tofu be cooked. Nutritional yeast (can be used as a topping on salads, pasta, rice, popcorn, steamed veggies, etc, and has a tangy somewhat cheesy flavor) supplies B vitamins an is available at most natural food stores. Veggies such as kale, broccolli, cauliflower, chard, collards, turnip greens and beet greens are good sources of calcium and other minerals.