Mackerel Soufflé

This was inspired by a recipe I saw in Delicious magazine. Smoked mackerel is a pretty cheap fish that you can use in a number of dishes, such as salads, omelettes, and this soufflé.

Ingredients:
15 g butter, plus more for the dish.
1/8 cup flour (about 15 g)
2 tbsp hot horseradish
1 cup milk
250 g smoked mackerel
black pepper
3 eggs

Instructions:
1. Grease an oven-safe dish. Melt the butter over low heat, then add the flour and the horseradish.
2. After another couple of minutes, add the milk until it gets warm.
3. Remove the skin and bones from the mackerel and then flake it into small pieces. Add it to the milk. Season with black pepper.
4. Separate the eggs. Add the yolks to the mackerel and mix. Whisk the egg whites.
5. Carefully mix the two mixtures together, then put them in the dish.
6. Bake at 200 C for 15-20 minutes.