Step 1: Prepare the Chipotle Yogurt Sauce

1. Combine Ingredients: In a medium bowl, mix the plain Greek yogurt, chopped chipotle peppers in adobo sauce, lime juice, honey, and a pinch of salt.
2. Blend and Chill: Stir the ingredients until well combined. Adjust the seasoning to taste. Cover the bowl and refrigerate for at least 30 minutes to allow the flavors to meld together.

Step 2: Make the Chicken Burger Patties

1. Mix Ingredients: In a large mixing bowl, combine the ground chicken, diced avocado, minced garlic, chopped onion, lime juice, fresh cilantro, ground cumin, smoked paprika, salt, and pepper.
2. Form Patties: Gently mix the ingredients until well incorporated. Divide the mixture into four equal portions and shape each into a patty.
3. Preheat Pan: Heat olive oil in a non-stick skillet over medium heat.
4. Cook Patties: Place the chicken patties in the skillet and cook for about 5-6 minutes on each side, or until golden brown and cooked through.
5. Rest Patties: Once cooked, transfer the patties to a plate and let them rest for a few minutes.

Step 3: Assemble the Burger

1. Toast Buns: Lightly toast the whole grain burger buns on a skillet or grill until they are golden and crisp.
2. Layer Ingredients: Spread a generous amount of chipotle yogurt sauce on both halves of each bun. Place a lettuce leaf on the bottom half, followed by the chicken patty.
3. Add Toppings: Top the patty with slices of tomato, red onion, and extra avocado if desired.
4. Complete the Burger: Place the top half of the bun over the toppings. Serve immediately with a side of your choice.