Blobbenstein
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Okay- maybe I'm wierd, but good-quality firm tofu in its plain state, before it's cooked in any way, reminds me a lot of how cottage cheese used to taste. Please don't go and buy some firm tofu to experiment with it if you weren't going to anyway, but if you get a chance, you might want to try it and see how close it comes. But if you liked cottage cheese creamy-style, it might not be close to that.
I tried to make some cottage cheese with tofu an nutritional yeast, but it didn't really work.