Big Mac Cheeseburger Bombs with Cheesy Beef and Pickles

Ingredients

• 1 pound ground beef
• 1/2 teaspoon onion powder
• 1/2 teaspoon garlic salt
• 1/2 teaspoon salt
• 1/2 teaspoon ground black pepper
• 1/3 cup finely minced white onion
• 1/3 cup finely chopped dill pickles
• 1/2 pound block American cheese
• 1 package frozen dinner rolls (24 pieces)
• 1 large egg, beaten
• Sesame seeds for garnish