With a variety of flavors and textures (and a whopping 30 grams of protein!), these meal-prep bowls will keep you fueled all afternoon. The spinach and feta turkey meatballs are adapted from Turkey Burgers with Spinach, Feta & Tzatziki by Hilary Meyer. Look for premade tzatziki near the specialty cheeses and dips at your grocery store, or make your own.