Chili Dogs

INGREDIENTS

• 1 medium onion, chopped
• Kosher salt and freshly ground black pepper
• 2 tablespoons prepared yellow mustard
• 1 teaspoon chili powder
• 1 pound lean ground beef
• 1/2 cup grated Cheddar
• 1 medium jar ketchup, about 2 1/2 cups
• 4 all-beef hot dogs (recommended: Ball Park)
• Extra-virgin olive oil
• 2 cloves garlic, chopped
• 4 hot dog rolls