Steak for breakfast isn't excessive — it's ambitious. A Sunday platter with eggs and steak is the highest protein way to start a day when you mean business.
Preheat a cast iron skillet over medium-high heat for at least 3 minutes to ensure a good sear on the steak.
Season the sirloin steak evenly with salt, black pepper, and garlic powder, then drizzle 1 tbsp olive oil on both sides.
Add the steak to the hot skillet and sear for 2–3 minutes per side for medium-rare, adjusting timing if you prefer your steak more or less done.
Transfer the steak to a plate, cover loosely with foil, and let it rest for at least 5 minutes while you prepare the eggs and vegetables.
In the same skillet, add remaining olive oil. Sauté the baby potatoes until golden (about 8 minutes), then toss in fresh spinach for 1 minute just to wilt.
Crack the eggs into a nonstick pan, cook over medium-low heat for 3–4 minutes until whites are set but yolks remain runny, or longer for firmer eggs.
Slice the rested steak against the grain and arrange on a platter with the eggs, sautéed potatoes, and wilted spinach. Serve immediately.