Baked oysters with creamy leek and mushrooms

1 dozen oysters

2 tbsp golden rapeseed oil

250g mushrooms finely sliced

1 tsp chopped fresh thyme

30g unsalted butter

1 small leek, finely sliced

3 cloves of garlic, minced

100ml white wine

125ml cream

100g panko breadcrumbs

2 tbsp rapeseed oil