Top-ranked recipe named "Baked spinach casserole"
In a little butter fry onions and garlic. When brown add spinach, corn or mushrooms,salt pepper sauces and 1/2 cup water.
While the spinach is cooking mix the flour with 1/2 cup milk and keep aside.
When cooked add the rest of the milk and bring to boil. Lower flame and add cheese and the milk flour mixture stirring continuously.The sauce will thicken as it boils. Keep stirring
till it leaves the sides. Pour onto an ovenproof dish. Cover with thin sliced tomatoes (if you want) and cheese. Bake for 30 mins at 350 degrees.