Cheesy Beef Sliders

Ingredients

• 1 pound ground beef
• 1 small onion, finely diced
• 2 cloves garlic, minced
• 1 tablespoon Worcestershire sauce
• 1 teaspoon salt
• 1/2 teaspoon black pepper
• 1 teaspoon dried oregano
• 12 slider buns
• 6 slices cheddar cheese, cut into quarters
• 6 slices American cheese, cut into quarters
• 1/4 cup butter, melted
• 1 tablespoon sesame seeds
• 1 tablespoon fresh parsley, chopped
• 1 teaspoon garlic powder