Cremini–Lamb Burger with Charred Scallions, Boursin, Pickles, and Tomato on a Potato Roll Recipe | J

Ingredients

• 4 tablespoons room-temperature unsalted butter, divided
• 2 shallots, peeled and minced
• 8 ounces cremini mushrooms, finely chopped
• 1 clove garlic, peeled and minced
• 1 tablespoon fresh thyme, roughly chopped
• 1 teaspoon kosher salt, divided
• 1 tablespoon olive oil
• 1 bunch scallions
• Freshly ground black pepper to taste
• 1 pound ground lamb
• 4 Martin’s potato buns
• One 5-ounce container of Boursin cheese, divided into 4 equal parts
• 1 ripe large tomato, sliced
• 16 crinkle-cut dill pickles