Juicy Grilled American Lamb Burgers with Caramelized Onion, Fennel & Lemon Relish


June 30, 2022

Recipe provided by the American Lamb Board (Juicy Grilled American Lamb Burger with Caramelized Onion, Fennel and Lemon Relish | American Lamb).

  • Prep: 30 mins
  • Cook: 15 mins



3 tbsp Extra-virgin olive oil

1 Red onion, cut into thick slices

1 Fennel bulbs, cut into 1/4 in slices

Salt & black pepper, to taste

1 tsp Rosemary, minced

Zest of 2 lemon, pith removed & rest finely chopped

1 tsp Honey

1 pinch Red chili flakes

American Lamb Burgers

2 lbs Ground American lamb

Salt & pepper, to taste

8 Dinner rolls or 4 larger buns

Mayonnaise, as needed

Arugula leaves, as needed



1Preheat grill to medium-high. Brush onion and fennel slices with oil; season generously with salt and pepper. Grill over medium-high heat until onion and fennel caramelize and soften, showing grill marks. Reduce heat; continue cooking onion and fennel until soft. Remove; cool then finely chop. In a bowl, add grilled onion and fennel, rosemary, lemon zest, lemon, honey and chili flakes. Season to taste.

American Lamb Burgers

1Gently form the lamb into 8 burgers; make sure meat is not compressed. Season generously with salt and pepper; grill to desired doneness. Remove some of the bread from the rolls to make a better bread-to-burger ratio. Grill rolls briefly; cool. Spread both sides of rolls with mayonnaise, spoon on some of the onion relish, some arugula leaves and the cooked lamb burger.