Preheat oven to 375℉ and line a baking sheet with parchment paper or a silicone baking mat.
In a large bowl, mix together the oil, Greek yogurt (or mashed banana), egg and vanilla extract until smooth. Stir in the cooked lentils.
In a medium bowl, mix together the flour, oats, brown sugar, cinnamon, baking soda and salt. Add these dry ingredients to wet ingredients and stir together.
Fold in the almonds, pumpkin seeds, chocolate chips and any extra add-ins you would like.
With a cookie scoop or a large spoon, scoop up about 1-2 tbsp of the cookie batter and place it on the prepared baking sheet. Repeat this with the rest of the batter, making sure to space out the cookie dough balls evenly. Lightly flatten the cookies using the back of a fork.
Bake for 13-15 minutes or until the bottom of the cookie is light brown. Let the cookies cool for 5-10 minutes before enjoying!