I got this recipe from my grandma's "Philadelphia" magazine. It is credited to the "fish master" Chip Roman of Conshohocken's Blackfish restaurant. The tomatoes take 4 hours to cook, which is included in the cook time. They are so delicious. You must use merguez sausage in this dish, which is a lamb sausage. Do not make other sausage substitutions. DH and I, not knowing what merguez was initially, made the dish with chorizo once and it was way too rich and didnt taste anything like how the dish is supposed to, now that I found and tried it with the merguez. The second time I made the dish, I put the tomatoes in the crock pot all day and then finished them in the oven when I got home and was ready to prepare the rest of the dish. Also, the original recipe (as I posted it) calls for 1 cup of za'atar. I found that was way too much for my needs and used about half that amount. The tomatoes are eaten whole as a side accompaniment to the fish.