You can easily put together a sauce using the following: oyster sauce, soy sauce, rice wine, a little broth or water, a little sesame oil if you think that flavor complements the dish or reminds you of the one you had. See how that goes and then start messing with the ingredients or the ratio of ingredients to make adjustments. That's just a very basic non-bean based sauce. If oyster sauce doesn't seem right, you might try hoisin sauce instead, but--just a guess here--it is more likely oyster sauce was used. For a basic beef stir-fry I would probably use oyster sauce for a bit of body.
If the dish was simply called sizzling beef you might look up other sizzling recipes and get ideas for the technique as well.
