Step 1

Add the potatoes to a pan of boiling water and boil until soft, about 15 minutes.

Step 2

Heat the oil in a large pan and cook the sausages according to the packet instructions - usually 10-12 minutes. Once cooked, set aside.

Step 3

Add the onion and mushrooms to the pan. Cook until softened, about 5 minutes. Add the flour, stock and Marmite. Simmer for a further 3 minutes.

Step 4

Once the potatoes are cooked, drain and add the butter, milk and mustard. Mash until you get your desired consistency.

Step 5

Chop the cooked sausages into bite-sized pieces and add to the pan of vegetables with the baked beans and thyme. Mix well.

Step 6

Transfer the sausage/vegetable mix to a large baking dish.

Step 7

Spread the mashed potato over the top of the sausage mixture then sprinkle with grated cheddar. Cook in a preheated oven for 30 minutes until the cheese has melted.