Panko Crusted Mozzarella Stuffed Japanese Curry Meatloaf

Name: Panko Crusted Mozzarella Stuffed Japanese Curry Meatloaf
Ingredients: for the meatloaf; 1 1/4 pounds ground beef; 1 1/4 pounds ground pork; 3/4 onion, minced; 8 ounces fresh mozzarella; 1/4 teaspoon nutmeg; 1/4 cup low sodium soy sauce; 1 large egg; 1/8 cup mirin; 1 1/4 cups panko; 1 teaspoon salt; 2 teaspoons curry powder; 1 tablespoon dashi; 1/2 large red bell pepper; for the curry sauce; 1 tablespoon butter; 1/4 onion, minced; 1 teaspoon curry powder; 1 teaspoon dashi; 1/2 tablespoon low sodium soy sauce; 1 1/2 cups water; 1/4 box curry roux