Hefen and beef with a black bean sauce

A very good beef and black bean sauce recipe. I used mince steak this time, as we had a large amount of mince in the freezer, and it worked well. Also, I use the black bean garlic sauce in the jar, not the fermented black beans, even though the author says not to, but I have cooked with it for years and it works for me. Served it on stir-fried greens, not rice noodles, as I already had two white dishes, and it saved cooking a separate dish for the greens.