1/2 cup milk
4 slices white sandwich bread, torn into pieces
1 1/2 pounds ground sirloin
1 1/2 pounds ground pork
2 small onions, finely chopped
6 garlic cloves, minced
1/2 cup chili sauce, plus 1/4 cup for glaze
1 cup chopped fresh parsley
1/2 cup grated Parmesan cheese
2 large eggs, lightly beaten
Coarse salt and ground pepper
1. Preheat oven to 350°F, with rack in center. In a large bowl, pour milk over bread; let soak, about 30 seconds. Add sirloin, pork, onion, garlic, 1/2 cup chili sauce, parsley, Parmesan, eggs, 1 1/2 teaspoons salt, and 1/2 teaspoon pepper. Using your hands, mix until combined; do not overmix or meatloaf will be dense.
2. Divide mixture in half. Gently pat each half into a log, and place each log in an 8 1/2-by-4 1/2-inch loaf pan. Do not press down or into corners.
3. Bake 50 minutes. Brush tops of loaves with remaining 1/4 cup chili sauce; continue cooking until juices run clear and an instant-read thermometer inserted into thickest part registers 160°F, about 10 minutes.
4. Remove from oven; let rest 5 minutes. Turn loaves out of pans; slice each into eight 3/4-inch-thick slices.