Melt the butter in a skillet over low heat.
Pour in liquid whole eggs, season with salt & pepper, and cook low and slow until scrambled, stirring occasionally.
Transfer eggs to a bowl and stir in chives.
Add a tortilla to the same skillet over medium-low heat. Layer with half the cheese, scrambled eggs, and remaining cheese. Cover with the second tortilla.
Let cook for 2-3 minutes or until brown and crispy underneath. Flip and cook the on the second side. Repeat with second quesadilla.
Remove from heat and top with pico de gallo, cilantro, and avocado.
Enjoy warm with hot sauce.