@Nemo actually, this is one that got too dense and is missing a bit of glaze - as always, when having some small cut ingredients in a mixed dish - and here the small soy puffs set the tone... and the baby corn already got soaked more than i wanted - one wants to err on the side of thin when it comes to sauce consistency, but it got a bit too thin there..
Get some lotus root when at your grocer: looks great in that kind of dish, what you don't use makes awesome tempura (crunchy throughout. Goes great over plain soba in broth, but that's just my opinion) , and you will have a good excuse to keep a laser gyuto around (these cut like a carrot and a water chestnut's bastard, and they are two inches thick, and are best used kept round and sliced 2-5mm).
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Ah, two more uses, though they don't strictly call for doubanjiang:
You can use it for fish-fragrant eggplant. I like using half/half doubanjiang and sambal oelek for that - make sure you don't make it too salty though! I suggest to use small japanese or turkish eggplants, slit them a couple times, then stir fry them whole a few minutes, then add aromatics and build sauce, braise (cooking times for various eggplants varies....), break up the eggplants only for the last few minutes of cooking... )
Wouldn't recommend the huge western eggplants - they can be bitter and you need to cut them up, which makes stir frying them without ripping off irregular pieces or getting a mushy layer of flesh a pain...
Have you made some ants climbing a tree yet? If you want a meatless version, crumbled firm tofu (maybe combined with diced shiitake and diced normal mushroom) fried HARD works great (as it does in mapo dofu of course...).