In a large bowl, mix together the ground lamb, onion, garlic, oregano, thyme, salt, and pepper until combined.
Form the mixture into 4 equal-sized patties.
Heat a grill or grill pan over medium-high heat.
Grill the patties for 4-5 minutes per side, or until cooked through.
In a small bowl, mix together the honey and mustard.
Brush the glaze onto the cooked patties and grill for an additional minute.
Serve the burgers on buns with your favorite toppings.