The sweet heat of the chili sauce adds a fresh hit of flavor to this beefy classic.
Preheat oven to 325 degrees. Soak breadcrumbs in milk. Mix together beef, onions, carrot, eggs, soaked breadcrumb mixture, salt, and pepper.
Combine all chili sauce ingredients and set aside.
Place meat mixture in 8 1/2-by-4 1/2-inch loaf pan. Make three holes, spaced evenly lengthwise, in meat mixture and fill holes with 1/3 to 1/2 cup chili sauce total.
Bake for 40 to 45 minutes. Remove from oven and let rest 10 to 15 minutes. Pour any accumulated juices back over top of meatloaf; slice and serve.