Seven friends and I went to Aspen for a 4-day ski/snowboard weekend. As background, we're all single professionals in our early to mid 30s from San Francisco and Los Angeles.
Mezzaluna : Casual, loud, somewhat Italian restuarant. Food was just so-so. No one thought their dishes were anything special, but we didn't try the pizzas. Decent and reasonably-priced wine selection. Service was good.
Bogie's : A couple of us weren't feeling well so we hung back in town while everyone else was on the slopes. While looking for lunch, stumbled into Bogie's, a very touristy-looking diner selling tons of souvenirs. Chicken soup with bread was a good size for $5, but extremely salty.
Rustique : Dark white-tablecloth country French restaurant. Not as crowded as Mezzaluna -- we were there on a Saturday night and there were always 1 or 2 tables open. Food was good but not great, but much better than Mezzaluna. The "old world risotto" was one with broccoli and 3 cheeses, but it was more like semi-melted cheese with some rice and veggies mixed in... not good. And their "weird dishes" aren't really that weird (are they marketing to people from Indiana??) -- I order sweetbreads all the time, though I'll admit not having tried calves' liver before at a restaurant.
Aspen Airport : We had dinner here when our flight out was delayed (it seems to be a common occurrence) and the food at this little place was actually quite decent for simple deli-like airport food.
Overall, I was disappointed in the food in Aspen. I've heard reports that it's the best food in Colorado, but surely places in Denver must be better. It's probably just the most expensive food in Colorado :) Ski resort food is usually overpriced and boring if you don't want to spend the super big bucks, and Aspen (from our experience) seemed to be just another confirmation of that.