Just like the one-pot meal, the convenience of an all-in-a-bowl meal is appealing, especially when it is balanced and healthy. Author Christal Sczebel, certified holistic nutritional consultant, runs with the concept in her book “Power Bowls: 100 Perfectly Balanced Meals in a Bowl” ($19.95), starting off with Wake Up Bowls like Huevos Rancheros or a …