Heat oil in saucepan over medium-high heat. Add onion and carrot; Saute 15 minutes or until lightly browned.
Add celery, mushrooms, and garlic; Cook 10 minutes.
Add Tomato Paste; saute 10 minutes or until browned.
Add flour; cook 1 minute.
Stir in wine, scraping pan to loosen browned bits.
Add water and remaining ingredients. Bring to a boil; reduce heat and simmer 45 minutes.
Strain through sieve into a bowl reserving stock. Discard solids.
Recipe Notes
Store in airtight container up to 1 week in refrigerator, or freeze up to 3 months. (For small amounts, you may want to freeze it in ice cube trays to make it easier to pull out only what’s needed.)