I wanted to share some of our experiences from the Pinnacle Grill. We were on the Westerdam last week, but it is my understanding that most (all?) of the Holland America ships have a Pinnacle Grill with the same menu. We went three times (!) so most of these are based on personal experience. Maybe this will help guide what you would like to eat on your special night there.
Lobster bisque - not the creamiest I've ever had, but a great taste.
Creme brulee - three small portions of creme brulee, one vanilla, one coffee, one chocolate.
Baked Alaska - Ben & Jerry's cherry garcia ice cream with meringue and a special cherry sauce, flambeed tableside.
Scalloped potatoes - Creamy, great onion and herb taste with a cheesy topping.
Steak Diane - tender filet mignon medallions with a very tasty sauce.
Roasted asparagus - yum!
Shrimp cocktail - enormous shrimp with a tasty cocktail sauce.
Any steak - the 1600 degree grill and spice rub make for steak perfection.
Lobster - a large tail that was seasoned nicely.
Volcano cake - warm, gooey chocolate cake with grand mariner whipped cream.
Also, I was told that the French onion soup was also very good. The only things I can't recommend that were tasted in our group were the Caesar salad and the salmon (both were just "okay").
Compared to the Pinnacle Grill food, most of the dining room meals were a little disappointing, but the surf and turf night was the best of the bunch. (In my opinion, that's the night not to skip.)