Can u make pasta sauce with ketchup & tomatoes?
If it’s fresh tomatoes chop up leave some chucks if you that take the lamb out put on a plate that is oven proof put in the oven and leave on warm put the fresh tomatoes in the juices that where left behind from the lamb let the tomatoes sweat a little then and the ketchup but not to much just eye ball it to make a sauce because you don’t want to drown the juices of the lamb and fresh tomatoes with the ketchup and if you have fresh onions and garlic chop up to and throw it in or onion and garlic powder is fine with some salt pepper let it simmer for couple of minutes then pour on top of the lamb and serve.