Italian Turkey Burgers

Bahan-bahan (6 porsi)

• 1 pound 99% lean ground turkey
• 1 pound turkey sausage (sweet or spicy with casings removed (I used spicy))
• 1/3 cup panko bread crumbs
• 2 teaspoons ground basil
• 2 teaspoons ground oregano
• 1 teaspoon fennel seeds
• 1 teaspoon garlic powder
• 1/4 teaspoon kosher salt
• 1/4 teaspoon ground black pepper
• 1/4 teaspoon crushed red pepper flakes
• 8 ounces Asiago cheese
• 8 ounces Mozzarella cheese
• 6 whole wheat hamburger buns (for serving)
• 1 large red onion (halved and thinly sliced)
• 1 g reen bell pepper (thinly sliced)
• 1 red bell pepper (thinly sliced)
• 2 tablespoons extra virgin olive oil