Preheat your electric waffle iron on a medium setting while you prepare the batter. This recipe moves quickly, so the batter should be ready when the waffle iron is hot. I set mine to a 4 out of 6, but each waffle iron may vary.
In a high-speed blender, combine the cottage cheese, eggs, rolled oats, maple syrup, olive oil, baking powder, vanilla extract, salt, and liquid of choice. Secure the lid on the blender and blend until smooth. Make sure to stop and scrape down the sides of the machine as needed, until no oats are visible.
When the waffle iron is ready, grease both plates lightly to prevent sticking. Pour 1/3 cup of batter into the center of the waffle iron. Close the lid and let it cook on medium heat until the waffle iron beeps that it's done. Don’t be surprised if steam releases from the sides; this is normal!
Cook each waffle for about 3 to 5 minutes until they are golden brown and fluffy. Use a fork to carefully remove the cooked waffle and transfer it to a wire rack to cool. If you place it on a plate, the bottom side might steam as it rests, so a wire rack is preferred.
Repeat with the remaining batter until you've made 5 to 6 classic waffles. If you're using a Belgian-style waffle iron, you'll wind up with fewer since it requires more batter per waffle.
Once all the waffles are cooked, enjoy them warm with your favorite toppings like fresh fruit, yogurt, or a drizzle of honey. You can freeze any leftovers in an airtight container for up to 3 months, making it easy to reheat straight from the freezer in a toaster on a medium setting.