Lunch bowls are an excellent way to combine nutrient powerhouses all in one bowl! My son, Jonathan, sends me his own versions from his blog, foodishowmymom . Anything goes. Add Greek yogurt, sweet potatoes, broccoli, avocado, red onion and sunflower seeds. Or brown rice, hummus, canned tuna, broccoli, red onion, olive oil and vinegar. Even a…