Alternative to Oyster sauce, you can use vegetarian Oyster sauce which I think is made from mushrooms. Or use soy sauce with some cornstarch mix with water will work as well. Or a little xanthan gum with soy sauce and water will do the trick too.
The black pepper sauce can be replaced with good old freshly cracked black pepper.
Yum! I'll save this! Thanks so much.
Welcome and Happy new year @sjennon 🙌