step 1
Heat the oven to 160°C with shelf towards the bottom third of the oven.
step 2
Trim any stringy or really hard bits from the inside of the heart
step 3
Place onion and garlic inside the heart and season with salt and pepper.
step 4
Tie the heart closed with string and season with salt and pepper.
step 5
Place in a roasting tin with the seam of the prepared heart on the bottom.
step 6
Cover with foil, making sure the foil doesn't touch the heart, and cook for 4-5 hours until juice runs clear.
step 7
Remove foil and cook for a further half hour at 200°C to crisp the fat if needed.
step 8
Serve with mashed potatoes, carrots and swede, Yorkshire puddings, roast potatoes and gravy.