I love Mignon. The lamb is awesome. They have a couple of cool booths that allow you to get close to your honey.(request them). The lighting is lower in the evenings yet, not too low that you can't read the menu. At nite the dress is anything from trendy jeans to cocktail dresses. Cozy, romantic, intimate without being pretentious or uppity. Beware the table seating isn't very intimate. Request one of the two crescent booths. I forget I am in Plano when I eat there.
Located just south of Spring Creek on Preston.