With an electric mixer, beat the eggs, sugar, pumpkin, and lemon juice until smooth. Sift together the flour, ginger, salt, baking powder, and cinnamon. Add to the mixer and blend until fully combined. Spread the batter in the jellyroll pan. Sprinkle the dough with the chopped pecans. Bake for 14 minutes, or until a cake tester inserted in the center comes out clean. Let the cake cool in the pan for 5 minutes.