We loved this sauce! It is sweet and perfectly counterbalanced the spice rub I used on our baby back ribs. I found that the sauce thickened enough without adding in the cornflour.
Enjoyed by myself, DM and DS (DH declined even though I had cut the onion chunky for him to remove). There was a general consensus it was a bit too strong in the tomato paste (possibly cut back to 50 or 75 grams). I had to use 1 tablespoon of fresh rosemary (DS had thrown out my dried rosemary - the autism in him), otherwise made to recipe. Will try it again with modifications to suit. Made for Recipe Swap #2.