01 - Preheat the oven to 425°F.
02 - Toss the cut potatoes with vegetable oil, salt, and black pepper on a baking sheet. Spread them in a single layer and bake for 30-35 minutes, flipping once, until golden and crisp.
03 - In a heatproof bowl, whisk together egg yolks, lemon juice, and Dijon mustard. Place the bowl over a saucepan of gently simmering water, whisking constantly until the mixture thickens slightly, about 2 minutes.
04 - Slowly drizzle in the melted butter while whisking until the sauce is thick and creamy. Remove from heat and season with salt, pepper, and cayenne. Keep warm.
05 - In a nonstick skillet, fry eggs sunny-side up or to your preference. Set aside.
06 - If using, cook bacon or sausage until crisp. Drain and crumble.
07 - Once fries are ready, immediately transfer to serving plates. Top with cheese curds, then layer with eggs, bacon or sausage if using, and green onions.
08 - Generously drizzle warm Hollandaise sauce over everything. Serve immediately.