The Best Meatballs You'll Ever Have

INGREDIENTS

• 1 pound lean ground beef
• 3/4 cup crushed seasoned croutons
• 1/4 cup chopped sweet onion
• 1 egg, lightly beaten
• 2 cloves garlic, chopped
• 3 tablespoons Worcestershire sauce
• 1 tablespoon prepared yellow mustard
• 1 teaspoon red pepper flakes
• 1 teaspoon Cajun seasoning
• 1 teaspoon extra virgin olive oil
• 1 tablespoon butter