1. Arrange rack on lowest position in oven. Heat oven to 350 degrees F. Heat 1 tablespoon oil in a large skillet over medium heat. Add onions, celery and 2 teaspoons garlic; cook 5 minutes, until vegetables soften. Stir in 1/2 teaspoon of the salt and the parsley. Remove from heat and let stand until cooled to room temperature.
2. Combine meatloaf mix, bread crumbs, ketchup, eggs, remaining 1/2 teaspoon salt, nutmeg and the cooked vegetables until blended. Transfer mixture to a shallow pan; shape into a 9-1/2x5-inch oval. Arrange bacon slices on top. Bake 70 minutes, until an instant-read meat thermometer inserted in center registers 160 degree F.
3. Meanwhile, combine tomatoes, 1 tablespoon oil, 1 clove garlic, 1/4 teaspoon salt and the pepper flakes in a 9-inch glass baking dish, breaking up tomatoes with a spoon. Bake on lower rack with meatloaf, 35 to 40 minutes, until sauce thickens. Serve with meatloaf. Makes 6 servings.