Tonight, April 19, is the first evening of Pesach. If you're hosting a seder you've certainly begun preparing, but just in case, you should be aware of the many recipe resources for restricted diets that exist for tonight and the rest of Passover:

• Allergy-Safe Alternatives For Your Seder Plate
• About.com Kosher Food: Special Diets and Passover
• About.com Parenting Special Needs: Gluten-Free Passover Recipes and Nut-Free Charoset
• Gluten-Free Bay: Gluten-Free Passover Recipe Roundup
• Kids Food Allergies Blog: Preparing For Passover (Includes Several Vegan Passover Recipes)
• Beyond Allergy: Allergy-Free Passover Recipes

Because of the religious restrictions on the use of certain grains -- especially wheat and corn -- Passover can be an especially useful time to stock up on certain staples if you have a wheat allergy, if you're a celiac, or if you have a corn allergy or intolerance. Our family is particularly fond of pesach crumbs (a potato starch-based shelf-stable bread crumb substitute), which we've found at larger supermarkets leading up to Passover for years.

More about corn-free and wheat- and gluten-free Passover products:

• Kids with Food Allergies: Kosher For Passover and Food Allergies
• Gluten-Free Bay: Why Passover Is A Gluten-Free Goldmine (includes some content on corn-free Passover products)