Cumin-Spiced Burgers with Harissa Mayo

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Ingredients

1. 3 pounds ground chuck
2. Kosher salt and freshly ground pepper
3. 1/4 cup plus 2 teaspoons harissa
4. 2 1/2 teaspoons ground cumin
5. 2 teaspoons garlic powder
6. 1 teaspoon dried thyme
7. 1 large red onion, sliced 1/4 inch thick
8. 1 tablespoon extra-virgin olive oil
9. Eight 6-inch oval rolls, split
10. 1 cup mayonnaise
11. 1 teaspoon caraway seeds
12. Tomato and cucumber slices

1. In a large bowl, gently mix the ground chuck with 1 tablespoon of kosher salt, 1 teaspoon of pepper, 2 tablespoons plus 2 teaspoons of the harissa, the cumin, garlic powder and thyme. Form the meat into eight 3/4-inch-thick oval patties. In a medium bowl, toss the onion slices with the olive oil and season with salt and pepper.
2. Heat a grill pan. Cook the onions over moderate heat, turning once, until tender, about 10 minutes. Transfer to a plate and keep warm. Grill the burgers over moderately high heat, turning once, until medium, about 8 minutes. Grill the rolls until lightly toasted, about 2 minutes.
3. Meanwhile, mix the mayonnaise with the caraway and the remaining 2 tablespoons of harissa; season with salt and pepper.
4. Spread the mayo on the rolls. Top with the patties, onions, tomato and cucumber; close the sandwiches and serve.