Avocado Burger with Chipotle Yogurt Sauce

Bahan-bahan (4 porsi)

• 1 pound ground chicken
• 2 cloves garlic (minced)
• 1/3 cup whole wheat Panko bread crumbs
• 1 -2 chipotle peppers in adobo sauce (finely diced*)
• 1 teaspoon adobo sauce (from the can of chipotle peppers)
• 1 teaspoon kosher salt
• 1/4 teaspoon pepper
• 1/4 cup finely chopped fresh cilantro
• 1 large ripe avocado (peeled, pitted, and cut into 1/4-inch chunks)
• 3/4 cup nonfat plain Greek yogurt
• 2 teaspoons adobo sauce (from the canned chipotle peppers above, or more to taste)
• 1/8 teaspoon kosher salt (or more to taste)
• 4 whole wheat hamburger buns
• Optional: lettuce ( or spinach, thinly sliced red onion, tomato, prepared salsa, nonfat plain Greek yogurt (or sour cream))