Preheat oven to 350°. In a large bowl, beat eggs, sugar and vanilla until well-blended. In another bowl, whisk together flour, baking soda, baking powder and salt; gradually stir into egg mixture. Stir in ground almonds and cranberries (mixture will be stiff).
Divide dough in half. Using lightly floured hands, shape each portion into a 9×3-in. rectangle on a parchment paper-lined baking sheet. Bake until lightly browned, about 25 minutes.
Cool on pans on wire racks until firm. Reduce oven setting to 325°. Transfer baked rectangles to a cutting board. Using a serrated knife, cut diagonally into 1/2-in. slices. Place on baking sheets, cut side down.
Bake until lightly browned, 8-10 minutes per side. Remove from pans to wire racks; cool completely. Store in an airtight container.