Preheat oven to 350 degrees Fahrenheit.
Whisk together flour, baking soda, baking powder, salt, cinnamon, nutmeg, and ginger. Set aside.
Cream butter, brown sugar, and granulated sugar until light and fluffy.
Add egg, vanilla, and lemon juice then beat well.
Mix in flour mixture.
Stir in oats, chocolate, raisins, dried cranberries, and pumpkin seeds.
Use a melon baller to scoop dough onto a baking sheet. Flatten the mounds slightly with a spatula.
Bake for 12-14 minutes, until the edges are just beginning to turn golden. Remove from oven and let cool on the pan for about two minutes. Transfer to a wire rack to continue cooling.
Enjoy! Store in an airtight container or freeze.
Serving Size 1 cookie