Preheat the oven to 350 degrees Fahrenheit.
In a bowl, mix together the flaxseed and lemon juice. Let sit for a couple minutes.
Add in the sugar, oil, and vanilla. Mix well.
Stir in the rest of the ingredients.
Place dough in a 12 x 4 inch log on a parchment lined baking sheet. Bake for 30 minutes.
Remove from the oven and let cool for 30 minutes. Increase the temperature of your oven to 375 degrees.
When the biscotti log has cooled, slice into pieces that are about 1/2 to 1 inch thick. Use a large knife and try and cut them in one motion - the dough will be very crumbly, so be careful!
Place the biscotti on the baking sheet. Bake on one side for 8 minutes, flip them over, and bake for another 8 minutes.