Step 1

Melt butter a clean frying pan

Step 2

Add olive oil, onion and garlic clove to the frying pan

Step 3

Cook in frying pan until soft - medium heat

Step 4

Cook chestnut mushroom in the frying pan

Step 5

Cook until lightly browned

Step 6

Add wholegrain mustard and crème fraîche to the frying pan

Step 7

Stir until heated through

Step 8

Season with salt & pepper

Step 9

Garnish with fresh parsley

Step 10

Serve immediately