Hello, Margaret!
Aren't there so many delicious ways to spend your Quick-Service credits on Walt Disney World's Dining Plan?
According to this
Dining Plan PDF, Epcot's Boulangerie Patisserie is still considered to be a Quick-Service restaurant. I took a look at an unofficial menu for this lovely little restaurant on allears.net (my favorite unofficial site for Disney info.) I believe that you are referring to the cheese plate as your entree, the pastry as your dessert and, of course, a non-alcoholic drink...all for one Quick-Service credit! YUM!
Keep in mind that menus are subject to change from year to year, as well as from season to season, so you might see differences from one visit to the next. The value of your Quick-Service choices, though is still there. :-)
Send more questions as you think of them, especially if you're looking for the best way to spend those dining credits!