Preheat the grill to medium-high heat (around 375°F / 190°C) and oil the grates to prevent sticking.

In a mixing bowl, combine ground turkey, onion, cilantro, garlic, jalapeño, cumin, paprika, lime juice, cheddar cheese, salt, and pepper. Mix gently.

Divide the mixture into six equal portions and shape each into a patty with a thumb indentation in the center.

Place the patties on the grill and cook for 5-6 minutes per side until they reach an internal temperature of 165°F (74°C).

Let the burgers rest for 3-5 minutes under aluminum foil.

Toast the hamburger buns, then assemble by placing each patty on the bottom bun and adding guacamole, cheese, tomato, and lettuce. Top with the other half of the bun.