Hake and king prawns gratin

PREPARATION

1. Chop the hake.

2. Peel the king prawns and chop them.

3. Peel the onion and finely dice it.

4. Gently fry the onion in hot olive oil and butter.

5. Add the hake and prawns and cook until they change colour.

6. Add the flour and fry it until it browns.

7. Add the milk and cook until it all blends together.

8. Remove from the heat and allow to cool.