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 (double boiler method), 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. 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. Layer with eggs, bacon or sausage (if using), and green onions. Generously drizzle warm Hollandaise sauce over everything. Serve immediately.