Most Memorable Recent Experience
This is, of course, too late for the o.p., but while I agree that Giorgio's is a lovely restaurant, they do not serve lunch on Saturday. And, though I like Blue Water Grill, I would hardly describe the food as memorable.
I have had a number of memorable lunches at Fleur de Sel, and Devi's 3-course lunch prix-fixe also fits that description. Both serve lunch on Saturday.