Spanakopita is probably my favorite food on earth, but it's a very labor-intensive dish, and is very high in calories, fat (including saturated fat from the rivers of butter it contains), and carbohydrates (one pound of phyllo dough!). This is how a poor bachelor Greek gets his home cooking on while keeping things light & healthy. This makes a hearty, protein-packed breakfast, satisfying lunch, or a quick & healthy main course for dinner served along side something like dolmades (stuffed grape leaves). By using eggs as the binding agent rather than cheese, you get a huge amount of good quality protein, and omitting the pastry crust cuts the calories dramatically - it also keeps in the fridge without getting soggy. If using fresh herbs / whole onion, adjust measurements and remove excess water by pressing spinach before adding eggs & baking.