Mutton Casserole with Buttery Chive Mash

Ingredients500g of mutton, diced20g of tomato paste100ml of red wine20ml of red wine vinegar500ml of chicken stock2 bay leaves1 sprig of thyme100g of carrots100g of celeriac 100g of swede1 onion, medium4 garlic clovesMash800g of Unthank Potatoes, peeled1/2 bunch of spring onion50g of butter100ml of milk1/4 bunch of chivesMethod1Preheat the oven to…