Preheat the oven to 350°F.
Grease a baking sheet (half-sized, which is 13”x18”x1”) with cooking spray then place a piece or parchment paper on top and generously grease the parchment paper.
Add the eggs and cottage cheese to a blender, along with 1/2 teaspoon kosher salt and 1/4 teaspoon black pepper. Blend just until combined.
If adding vegetables or cheese, add them to the baking sheet.
Pour the egg mixture onto the baking sheet then place it in the oven. (Alternately, place the baking sheet in the oven and then pour on the eggs to avoid transferring a baking sheet of liquids.)
Bake the eggs until they are set, 15 to 18 minutes. Remove them from the oven and allow them to cool slightly before slicing into squares and serving.