This is a restaurant etiquette question. There's a kosher dairy restaurant in Brooklyn that makes fabulous pancakes (Cafe K), but all they offer as toppings are "syrup" and chocolate sauce. I like orange marmalade on pancakes & waffles. I checked various brands, and I see that Hero preserves from Switzerland have the OU. Would it be appropriate for me to bring an unopened jar and explain my preference, or would that be considered a major faux pas?