Two medium onions finely chopped
Two stalks celery, finely chopped.
6 cloves of garlic, minced.
Saute the onion, celery and garlic until brown.
Add...
50oz canned diced tomatoes.
1c balsamic vinegar
1/3 cup red wine
1/3 cup Worcestershire sauce
2 cups brown sugar
3tbsp Dijon mustard
1tbsp chopped rosemary
2 bay leaves
lemon zest from half a lemon
lemon juice from half a lemon
2tsp salt.
Let simmer for an hour. Fish out the bay leaves. Take a stick blender to the rest.
Strain.