Deep-fried onion flower with Mussels and Parmesan

Ingredients

• 3 shallot onions, thinly sliced
• 2 cabbage leaves in thin strips
• 2 dl white wine
• 2 dl fish broth
• 100 g Engleviken mussels, finely chopped
• 1 sprig tarragon
• 1 sprig thyme
• 1 dl milk
• 1 dl whipping cream
• 2 tbsp butter