Lamb-Bacon Burgers with Spicy Aioli Recipe - (4.4/5)

Ingredients

• 1 large egg yolk*
• 2 teaspoons Dijon mustard
• 1/2 cup vegetable oil
• 1 canned chipotle chile in adobo, finely chopped
• 1 garlic clove, finely grated
• 2 teaspoons finely grated lemon zest
• 1 tablespoon fresh lemon juice
• Kosher salt
• 4 plum tomatoes, cored, halved lengthwise
• 1 tablespoon thyme leaves
• 1 tablespoon plus 2 teaspoons olive oil
• 1 1/2 teaspoons kosher salt, plus more
• Freshly ground black pepper
• 1/2 pound thick-cut bacon, cut into pieces
• 1 pound ground lamb, preferably from the shoulder
• 3 tablespoons finely chopped fresh oregano
• 3 tablespoons finely chopped fresh sage
• 4 brioche buns, toasted
• 1/3 pound fresh mozzarella, thinly sliced
• 3 cups baby arugula
• 1 teaspoon Sherry vinegar or red wine vinegar