Preheat your oven to 400°F and line a baking sheet with parchment paper.
Toss the diced sweet potatoes with 1 teaspoon of avocado oil and a pinch of sea salt, then spread them in a single layer on the baking sheet.
Roast the sweet potatoes for 20-25 minutes, tossing halfway through, until they are tender and caramelized.
Season the steak with salt and pepper. Heat the remaining teaspoon of avocado oil in a skillet over medium-high heat.
Sear the steak for 3-4 minutes per side for medium-rare, then remove from the pan and let it rest for 5 minutes before slicing into thin strips.
In the same skillet, add the spinach and sauté for 1 minute until wilted.
Lower the heat to medium, whisk the egg, and pour it into the pan with the spinach.
Gently scramble the egg until just set, then serve immediately alongside the sliced steak and roasted sweet potatoes.