Menu Verbage for wait time

I have a very small cafe where you order at the counter and we deliver the food to the table.  I use all fresh ingredients, and every order is made to-order.  Because they order at the counter, it seems my customers' perception is that it is fast food, so the only complaints I ever hear are about the wait time (approx 10-15 mins).  I would like to put a statement on my menu or at the counter like "All menu items are prepared fresh to-order.  This takes time... but it will be worth it" or something.  I have seen in another cafe "Each order prepared to order.  If you are in a hurry, we look forward to seeing you another time" which I thought was a little harsh?  Looking for ideas, opinions, etc.  Thanks!