Prepare the lamb mixture: In a large bowl, combine the ground lamb, parsley, mint, thyme, garlic, Dijon mustard (if using), paprika, salt, and pepper. Mix well until all ingredients are evenly incorporated.

Form the patties: Divide the lamb mixture into 4 equal portions and shape them into burger patties.

Cook the burgers: Heat the olive oil or butter in a large skillet over medium-high heat. Add the lamb patties and cook for about 4-5 minutes on each side, or until they reach your desired level of doneness. Make sure the internal temperature reaches 160°F (71°C) for fully cooked lamb.

Serve: Serve the lamb burgers on lettuce leaves or your preferred keto-friendly bun. Top with your favorite toppings, such as avocado, tomato, red onion, or crumbled feta cheese.