In a large pot combine the diced carrots, onions, and celery. Add a dash of kosher salt.
Cook over medium high heat, stirring often until the vegetables have browned and softened.
Add in the tomato paste and chicken stock. Stir to combine and bring to just a boil. remove from heat.
If you want a smooth sauce then puree in a food processor, blender, or with a stick blender.
Taste and add salt and pepper to your liking.
Serve over your favorite pasta. You will need about a pound and you may have leftover sauce.