Taste-Off: The best frozen gyoza, potstickers — and the ones that didn’t pan out

When it comes to snacks, there are few bites more welcome than a savory, umami-packed dumpling that bursts with mushroom or chives, edamame or earthy greens — a melange of flavors that make you reach for one after another.

While frozen dumplings come in a many styles and are typically filled with pork or chicken, for this feature we stuck with vegetarian gyoza and potstickers, the kind of dumplings that are often fried, steamed and served with dipping sauce.

A quick scan of local...