Holidays always seem to pose a problem, but they really only beg for a little creativity and some self-control when it comes to traditional high carbohydrate foods. Satisfactory solutions can be found! In England, it is very traditional to have pancakes with jam or sugar on Shrove Tuesday (practicing or not), so I ended up making egg fu yung pancakes. Substitute whenever possible for something similar but LC. The recipie archive may give some suggestions on specific dishes.

And if you aren't doing the cooking... lucky you.

Passover has some obvious advantages to LC: roast lamb, clear soups (no matza balls! avoid borst), chicken, and fish. Bits that are good include almonds, smoked salmon, horseradish, and marror (bitter herbs). Cheeses are fine... I double checked a few kosher sites on the Internet which listed kosher mozzarella, feta, and ricotta, and I know for a fact that Philadelphia cream cheese is Kosher. Lox and cream cheese...

As for foods to avoid, Matzah is up there, though if you participate in the ceremony, a bite certainly won't kill you. Others to avoid: rugelach, potato kugel, noodles/dumplings, knishes, tzimmes, blintzes, and cholent (traditionally contains potatoes, beans, barley, etc.)

Some things to watch out for: the customary four cups of wine-- Passover wine is sometimes high in sugars or even substituted with grape juice. Also, gefilte fish is sometimes made with carrots and beets that you want to avoid.

I hope this helps. Happy Passover!