I did in March. It did take on a very very dark colour but wasn't burned at all. I'd like to know where I put my recipe though

My nan gave it to me. The recipe was far too much for one slow cooker, I had to borrow my MIL to use as well. It was a little runnier in the slow cooker but when I did it in a pot on the stove I scooped the liquid off the top like my nan did but I didn't in the slow cooker.
I skin the tomatoes, just simmer a pot of water and drop the toms in for like 30 seconds and scoop them out and just rub and the skin drops away. But yeah it's just toms, ezy sauce, onion and sugar and a bit of curry powder not sure but maybe salt. I sure hope I can find my recipe before March again.
I found a recipe for Chilli jam earlier this year which is similar but has a chilli in it obviously. I'm going to try that too when toms are in season and cheap.
Cooking it in the slow cooker was easier because I didn't have to stir it regularly like on the stove and no fear of it sticking. It was a whole day thing on the stove top but with the slow cooker I put it on overnight and then turned it off in the morning and did a few jobs and it was cool enough to bottle but on the stove top I'd be bottling at 11pm.