Butter
1 egg
1 slice of good quality country bread
2 to three slices of thinly sliced prosciutto di Parma
Fleur de sel and freshly ground black pepper, to taste
Heat a small skillet over a low flame. Add a pat of butter. Once the butter is melted, crack the egg into the pan. Cook the egg over a low flame, until the white sets, becomes opaque, and the edges are lightly browned and crisp, 3 to 4 minutes.
Meanwhile, slather the bread with a pat of butter. Arrange the slices of prosciutto on top. When the egg is ready, slide it on top of the prosciutto. Season with salt and pepper. Serve immediately.