A tester has had great success using flaxseed meal in place of the egg. She said she actually preferred it, and the texture was more “cracker-like”.To replace the egg with flaxseed meal combine 1 tablespoon of ground flaxseeds with 3 tablespoons of water. Soak for a few minutes and then add to the batter.For the topping, I usually use Trader Joe's Everything Bagel topping, but any combo of seeds will work.