Toast your bread slices by applying butter on both sides till crispy..
Heat oil in a frying pan and sauté the spinach for about 3-4 min by which tme the spinach will be completely wilted and cooked.Season with salt and pepper and set aside in a bowl.
Wipe the pan with a paper towel and add some more oil in it..
Crack a egg carefully in a small bowl and drop it in the hot pan.Let it cook on a slow flame for about 3-4 min..Season with salt and pepper.
Now assemble the sandwich by placing a generous spoonful of spinach over the toasted bread and add the fried egg over this.Cover it with the other slice.
Cut it in half and enjoy..