Slice the top sirloin steak into thin, bite-sized strips and finely dice the red bell pepper and yellow onion.
Heat the ghee in a large cast-iron skillet over medium-high heat until shimmering.
Add the steak strips to the skillet and season with half of the sea salt, black pepper, and garlic powder.
Sear the steak for 2-3 minutes until browned and caramelized, then remove from the pan and set aside.
In the same skillet, add the diced peppers and onions, sautéing for 4 minutes until they are tender and slightly charred.
While the vegetables cook, whisk the eggs in a small bowl with the remaining sea salt, black pepper, and garlic powder.
Add the baby spinach to the skillet and stir for 1 minute until just wilted.
Reduce the heat to medium and pour the whisked eggs over the vegetables, stirring gently to create soft, fluffy curds.
Fold the cooked steak strips back into the egg mixture until heated through and serve immediately.