The afternoon seems to beg for something sweet. The right granola already contains a decent amount of protein and fiber, but adding some nonfat milk increases protein by up to eight grams. Dairy is loaded with protein, potassium, calcium, and vitamin D, which muscles need to function properly.
After taking an afternoon walk, enjoy some granola with nonfat milk (or Greek yogurt) and fresh blueberries.
Total protein: 12 grams