Prepare the eggs: Place eggs, kale, and salt in a Vitamix or blender. Blend on high for a just few seconds until smooth. Don’t over blend or let it get warm.
Melt Butter or oil: Place an 8″ non-stick pan over low to medium-low heat. Add butter and let it melt until just foaming
Cook Curds: Pour in the eggs. Immediately use a spatula to stir rapidly while shaking the pan to create very small, soft curds (like creamy scrambled eggs).
Set and Fill: When eggs are mostly set but still slightly moist on top, spread them evenly. Add with any cheese, vegetables or herbs on one side of the omelette if using.
Fold Tilt the pan, and gently fold the eggs away from you using the spatula (or tap the handle to shake it down).
Plate: Use your spatula to slide the omelette onto a plate and serve.