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I looked up a few recipes, but found conflicting information about what temperature to cook at in an oven - I found 200 C, 135 C and 110 C - all very different. I read that the broth needs to lightly simmer, with the occasional bubble popping to the top - so with some trial and error in my oven I settled on around 140 C.
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So I've put the tub in the fridge to cool properly, and I heated up a mug of the mixture and added a little salt to try it out. It's a little greasy, but that's probably because I haven't let the broth cool and allowed the fat to separate yet - I was eager to try out my first batch. However it is fairly tasty.
If anyone has some advice that could help me improve on this - especially regarding oven temperature and ideal length of cooking depending on the amount you are cooking, I would be grateful to read.