Korean BBQ Meatballs with Spicy Mayo Dip

Ingredients:

For the Meatballs:
1 pound ground beef
1/4 cup breadcrumbs
1/4 cup grated Parmesan cheese
1 egg
1/4 cup chopped onion
2 cloves garlic, minced
1/4 cup chopped fresh parsley
1/2 teaspoon dried oregano
1/4 teaspoon salt
1/8 teaspoon black pepper
1 tablespoon soy sauce
1 teaspoon sesame oil