1/4 cup freshly grated Pecorino Romano cheese
1/4 teaspoon kosher salt
Freshly ground black pepper
2 tablespoons olive oil
3 cups day-old bread cubes (about 1 inch)
Mix the cheese, salt, and a few grinds of black pepper in a small bowl; set aside. Cut the bread into roughly 1- inch cubes.
Heat the oil in a large frying pan over medium-high heat until shimmering. Add the bread cubes, toss to coat with the oil, and arrange in a single layer. Toast the bread, tossing every minute or so, until the cubes are golden-brown on all sides, about 5 minutes total.
Remove from the heat and transfer to a large bowl. Immediately sprinkle with the cheese and pepper mixture and toss to combine. Serve immediately or let cool completely.