Make the batter first by whisking the egg in a bowl. Add the milk and a big pinch of salt and pepper. Slowly sift in the flour, stirring well so there are no lumps.
Let this sit while you crack on with the filling. Heat a tbsp. of the butter in a pan and add the garlic and button mushrooms. Sauté for 5 minutes then add in the spinach a bit at a time until it has totally wilted. Turn off the heat and leave this to the side.
Pop the grill on your oven.
Heat another frying pan to a medium heat, add ½ tbsp. of butter and pour out ½ of the batter. Allow to cook for a few minutes then flip over. While it is cooking add in ½ the spinach and mushrooms, ½ the goats cheese and ½ the chopped chives, then crack an egg into the middle. Fold the edges in creating a square with the egg in the centre. Cook for another two mins then pop under the grill to finish off for 2 minutes or until the egg white is hard and yolk still a little runny. Repeat with the rest of the mixture, season and serve hot.