It's dinner time!

Ingredients

• 1 drizzle olive oil
• 1 small sweet onion, diced
• 3 pounds lean ground beef
• 1 ¼ cups ketchup
• ¼ cup prepared yellow mustard
• ¼ cup white vinegar
• ¼ cup brown sugar
• 1 tablespoon Worcestershire sauce
• 1 teaspoon garlic powder
• 1 teaspoon onion powder
• salt and ground black pepper to taste
• 10 hamburger buns, split