Preheat oven to 400℉
Prepare the vegetables and herbs as indicated in the recipe list.
Place the prepared tomatoes, garlic, carrots, bell pepper, onions, basil, parsley, and oregano on a parchment lined baking sheet. Drizzle with oil and toss to coat. Spread out in a single layer (use a second baking sheet if first is too full).
Roast in oven until all vegetables are fork tender, about 40 minutes (begin checking at the 30 minute mark). Roasting may take longer if veggies are cut in larger pieces, the baking sheet is packed full, or vegetables are especially firm.
Once vegetables are tender, transfer the herbs and vegetables to a large saucepan or dutch oven. Using an immersion blender, carefully blend the hot veggies until the desired smoothness or chunkiness is reached. (If you don't have an immersion blender, let veggies cool slightly and carefully transfer them to a standing blender. Use caution as the contents will be hot! After blending, transfer to the large saucepan.)
To the blended mixture, stir in the chicken stock until desired consistency is reached. Season with salt and optional sugar to taste.
Simmer on low, stirring occasionally until heated through. You can let this simmer on low, covered, for up to an hour to let the flavors meld while you prefer your pasta and side dishes. Serve over your favorite noodles, as a lasagna sauce, or for dipping garlic bread or breadsticks. Enjoy!
Store unused sauce in an airtight container in the refrigerator for several days. May be frozen in a freezer-proof, airtight container for several months. Thaw in the refrigerator and reheat in a saucepan.