FOR THE HENDO’S CARAMELISED ONIONS

Peel and halve the onions before thinly slicing them. Add the butter to a large pan, and when melted add the onions. Sauté until soft, then add the sugar and Henderson’s Relish. Cook for a further 30 to 40 minutes, stirring occasionally until the onions are a dark brown colour and have a slightly jammy texture. Season to taste with salt and black pepper, then cover and keep warm until needed.

FOR THE BURGER

Heat a little oil in a frying pan over a medium heat, then sauté the chopped onion until softened. Put this into a bowl with all the other ingredients and mix to combine. Using your hands might be easiest for this. Divide the mixture in half and shape the pieces to form two patties.

Fry the burger patties in the same pan over a medium heat with a little oil for 3 minutes on each side, or until cooked to your preference.

TO SERVE

Serve the burgers topped with Hendo’s caramelised onions in the buns with accompaniments of your choice. We’ve added sliced vine tomatoes and fresh rocket with extra onion rings.

Preparation time: 5 minutes

Cooking time: 8 minutes