Mushroom rarebit with mash & thyme gravy
IngredientsFor the mash1kg floury potatoes, chopped into chunks25g butter100ml milkFor the mushrooms4 large flat mushrooms, stems removedolive oil, for brushing25g butter1 medium onion, chopped1 tbsp plain flour75ml Guinness or other stout140g vegetarian mature cheddar, grated1 tsp English mustard2 eggs, beatenFor the gravy2 tbsp extra-virgin rapeseed oil or olive oil1 medium onion, chopped2 tsp thyme leaves,…