Chicken sausage burgers with balsamic onion barbecue sauce

  • Extra-virgin olive oil, for liberal drizzling plus 2 tablespoons
  • 1/4 pound pancetta, chopped
  • 2 red onions chopped
  • Salt and black pepper
  • 1 fresh bay leaf
  • 900g ground chicken
  • 9g fennel seed, lightly toasted
  • 1 teaspoon crushed red pepper flakes -- go heavier for extra spicy
  • 1/4 teaspoon allspice
  • Zest and juice of 1 orange
  • 17g finely chopped rosemary, 4 to 5 sprigs
  • 4 cloves garlic, grated with a microplane or the small side of a box grater
  • 2 generous handfuls of grated Parmigiano Reggiano or Romano cheese
  • 2 tablespoons Worcestershire sauce, eyeball it
  • 120ml aged balsamic vinegar
  • 3 tablespoons honey or dark brown sugar
  • 1/2 chicory, chopped
  • 90g rocket leaves, shredded
  • 1/2 radicchio, chopped
  • 4 crusty rolls, split, toasted and drizzled with extra-virgin olive oil or buttered
1) Put 2 tablespoons extra virgin olive oil in a pot over medium high heat. If you're cooking outside you can cook over the barbecue flames. Add the pancetta to the pot and crisp it up, 3 to 4 minutes, add the onion to the pot and season with salt and peppergo . Go heavy on that pepper - the black pepper will really balance out the sweetness of your sauce later on. Add the bay leaf to the pot.

2) While the onions cook, place the ground chicken in a bowl and add fennel seed, red pepper flakes, allspice, orange zest, rosemary, garlic, salt and pepper, to taste, and cheese. Mix the meat with seasonings and form four large patties. Make a shallow dent in each patty at the centre of it to prevent the burger from bulging up as it cooks. Wash up and drizzle the patties liberally with extra virgin olive oil. Place the patties on the grill and cook 6 to 7 minutes on each side.

3) When the onions are very soft and begin to caramelise, remove the bay leaf and add the Worcestershire sauce, balsamic vinegar, honey or sugar and orange juice. Let the sauce thicken up and sweeten for 6 to 7 minutes until the liquids are syrupy. Adjust the black pepper level to your taste.

4) Mix the chopped endive, shredded rocket and chopped radicchio together. Pile the chopped lettuces on the bap bottoms, top with burgers and lots of onion barbecue sauce.

Set bap tops in place and serve.

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