Lamb Burgers with Goat Cheese Spread

Name: Lamb Burgers with Goat Cheese Spread
Ingredients: 4 ounce goat cheese, room temperature; 1/4 cup sour cream; juice of a 1/2 lemon; 1/2 teaspoon salt; 1/4 teaspoon black pepper; 2 tablespoon olive oil; 1 pound ground lamb; 8 ounce crimini mushrooms, cleaned, stems removed and finely chopped in a food processor; 1 small onion, grated; 1/2 cup chopped parsley; 2 cloves of garlic, minced; 1/2 tablespoon ground coriander; 3 teaspoon kosher salt; 1 teaspoon black pepper; 1 teaspoon ground cumin; 1/2 teaspoon ground cinnamon; 1/2 teaspoon ground allspice; 1 medium red chile, finely chopped (alternatively 1/4 teaspoon cayenne pepper); 6 hamburger buns (preferably brioche); arugula for serving