Put all ingredients into baking tray with herbs tied in a bunch for easy removal. Bake for 2 hours or until little moisture is left. You can then sieve the mixture, or put it through a mould to make a smooth sauce, or not if you want it textured.
Check seasoning and adjust if necessary. Store in airtight container in fridge for up to 2 weeks or freeze for later use with pasta, in stews or braises, as a soup base or whatever!