Cut the onion, zucchini, mushrooms, and pork into bite-sized pieces.
Heat olive oil in a pan and stir-fry the pork.
When the pork is halfway cooked, add the onion, zucchini, and mushrooms, and stir-fry together.
Instead of black bean paste, add unsweetened soy milk and doenjang (soybean paste), and mix well with the other ingredients while stir-frying.
Season with low-sugar soy sauce, serve over zucchini noodles (or konjac noodles).