On fries? It's not bad, especially after you get used to it. The carrots mimic some of the onion/garlic flavor, but it's not exact. And yes, I do wish it could be! If you try it and come up with improvements, feel free to put them in the comments.
1 small can tomato paste (6 oz)
5 Tbsp sugar
3 Tbsp + 1 tsp cider vinegar
1 Tbsp pureed carrots (baby food)
1 1/2 tsp salt
1 tsp paprika
1 tsp celery salt
pinch ground cloves
pinch cayenne pepper
Mix. Store leftovers in refrigerator.