Celery—the recipe is 2 cups carrots, 1 cup celery, and 10 oz beef, plus garlic, ginger, scallions, etc. I love celery, I think next time I might actually include more.
Did you use Chinese celery or western celery? I can't stand most celery in supermarkets in Canada, but the thin kind sold here is lovely. It's not thready at all, and it has a concentrated celery flavour.
This dish was surprisingly bland, at least to my palate. Despite having three tablespoons of garlic to two servings, the way the garlic is cooked tones its flavor down to nearly imperceptible levels. The cucumbers faded into the background, and I was left with basically soy sauce and salt. It wasn't bad, per se, but it wasn't exactly good either. Just sort of... OK. Maybe my cucumbers were too bland?
What kind of cucumbers did you use? Japanese or Kirby cucumbers would provide better flavour than "English" cucumbers, if you have access to them this time of year.
To be honest, not a lot of Grace Young's recipes look that inspiring to me.
BUT, that being said, are you only serving these dishes alone with rice? Because a dish like that might shine in a meal where you're serving a soup, a spicy dish, a braise, and maybe a pickle alongside. It's more of a counterpoint dish, isn't it? For two people, that's too much, but when I stir-fry dinner I always have a separate green or other veg and a pickle on the table as well, so I can take advantage of the contrasts. A plainer dish like that I'd pair with a spicy daikon pickle and maybe a soft vegetable? Braised pumpkin, say.
There are always leftovers, but they get bunged into a Lock n' lock for lunch.