Combine mustard, honey and 1 teaspoon oregano; reserve. Combine ground beef, 2 tablespoons honey-mustard sauce, remaining 2 teaspoons oregano, onion and pepper, mixing lightly but thoroughly. Divide beef mixture into 4 equal portions; shape into four 1/2-inch thick patties, 4 inches in diameter. Heat large heavy nonstick skillet over medium heat 5 minutes. Panbroil patties 7 to 8 minutes, turning once.

grilled burger. Spoon reserved honey-mustard sauce over burgers; garnish with onion rings, if desired. Close with roll tops.