1. Preheat oven to 350 degrees. In a medium bowl, beat together 2 eggs and oil until frothy. In another bowl, combine flour, salt, baking powder, sugar, and sesame seeds. Mix into egg mixture. Add extra flour if needed to make a stiff dough; it shouldn't be sticky.

2. Roll out dough on a lightly floured board as thinly as possible. Using a 3-inch-round biscuit cutter, cut into circles. Arrange on a greased or parchment-lined baking sheet. In a small bowl, whisk together 1 egg and 1 tablespoon water to make egg wash. Brush wafers lightly with egg wash. Poke holes all over crackers with a fork, making sure the holes go all the way through.

3. Bake for 10 minutes, or until brown around edges. Turn over, and bake until golden brown and crisp, about 4 minutes. Let cool; store in an airtight container.