In a medium non-stick skillet over medium-high heat, cook the ground pork chorizo until browned and crispy, about 5-6 minutes.
Remove the chorizo from the pan, leaving a small amount of rendered fat, and add the baby spinach to the skillet until just wilted.
In a small bowl, whisk the eggs and egg whites with sea salt and black pepper.
Lower the skillet heat to medium and pour the egg mixture into the pan, scrambling gently until just set.
Warm the tortilla in a separate dry pan or microwave for 10 seconds to make it pliable.
Layer the chorizo, scrambled eggs, and spinach in the center of the tortilla, then fold in the sides and roll tightly.
Wipe the skillet clean, add avocado oil, and place the burrito seam-side down over medium heat.
Toast for 1-2 minutes per side until the exterior is golden and crispy, then serve with fresh salsa.