Spiced Grilled Cheese | Cooking Professionally

Ingredients

• 1 (1-pound) beef roast, sirloin, chuck, or lean ground beef, cut into chunks if using a roast or steak
• 1 teaspoon sugar
• 1/2 teaspoon salt, plus more, to taste
• 2 tablespoons vegetable oil
• 1/2 medium onion, finely chopped
• 1 tablespoon curry powder
• 1 teaspoon cracked black pepper
• 1/2 teaspoon cayenne pepper, optional
• 4 tablespoons tomato sauce or ketchup
• 2 teaspoons crushed red pepper flakes, optional
• 1 (8-ounce) block pepper jack cheese, shredded
• 1 (8-ounce) package fresh mozzarella cheese, finely chopped
• butter, to taste
• 12 slices bread