step 1
Cook spinach according to package directions, drain well. Separately mix egg and milk, whisk well - add pepper if desired. Butter/grease a rectangular glass pan.
step 2
Place layer of spinach, then layer of cheese, then layer of rye bread, then layer of chopped olives. Pour egg/milk mixture over layers. Sprinkle parmesan over top.
step 3
Bake at 275-300C for 40minutes or until knife is inserted and comes out clean.
step 4
Serve hot or store covered in fridge.