Prep the asparagus by washing and trimming the tough ends.

Heat olive oil in a large skillet over medium heat; sauté the diced onion until translucent (about 3-4 minutes).

Add the chopped asparagus and cook until bright green and tender (approximately 4-5 minutes).

In a bowl, whisk together eggs, salt, pepper, and feta cheese until frothy.

Pour the egg mixture over the sautéed vegetables in the skillet; gently stir to combine.

Cook on low heat for about 8-10 minutes until edges are set but center is slightly jiggly. Covering helps cook evenly.