Thaw frozen Spinach and cook in a little butter for a few minutes with some pepper and salt.
In a large bowl place pre-cooked rice, spinach, herbs and cheeses - spinach will cook in the oven. Season with soy sauce and cracked pepper. Mix all together. Only if mixture looks too dry add a little water. Cabbage, zucchini and carrot salad which is leftover can be added to the pie with spinach (blend salad first).
Blend bread intobreadcrumbs. Grease tray well with oil. Press beadcrumbs firmly into trays. Bake base for 10 minutes in oven.
Place spinach mixture into trays and cover with filo. Put about 6 sheets on at a time, buttering between these layers. Take filo pastry out of freezer only 1 hour before use. Melt a small bowl of butter in the microwave for this and use pastry brush. Sprinkle with sesame seeds.
Cook for 45 min-1hour and 180 degrees C, checking to see top doesn't burn. You may need to cover with aluminium foil if it does.