Preheat the oven to 350F. Then cover the 2 baking sheets with parchment paper. Place the oatmeal in blender or food processor and process until oatmeal is finely ground up. Combine the ground oatmeal to the flour, baking soda, cinnamon, and the salt in a mixing bowl.

In a second bowl, cream the butter, vanilla, lemon juice, and sugars together using an electric mixer. Then add the eggs and continue to beat until fluffy.

Stir the flour mixture into the egg mixture. Make sure to blend this together well. Add the chocolate chips and nuts to the dough and mix well. Use ¼ cup of the dough for each cookie, scoop round balls with an ice cream scoop and place them 2½ inches apart on the baking sheets.

Bake until the cookies are lightly browned about 18 minutes. Then put the cookies on a wire rack to cool. They should be stored in a container with a cover on it to keep them chewy and soft.