Baked Hamburgers - Master recipes

Ingredients

• 1 small onion, chopped -
• 1/4 cup dry bread crumbs -
• 2 tablespoons 2% milk -
• 3/4 teaspoon salt, divided -
• 1/4 teaspoon pepper -
• 1/2 pound ground beef -
• 1/3 cup water -
• 2 tablespoons brown sugar -
• 2 tablespoons ketchup -
• 1/2 teaspoon ground mustard -
• 1/2 teaspoon white vinegar -
• 2 hamburger buns, optional -
• Sliced red onion, optional -