Preheat oven to 375ºF.
In a cast iron pan or oven safe skillet, heat the olive oil over medium heat. Add the asparagus tips and a pinch of salt. Cook for 2-3 minutes until the asparagus is vibrant.
In a medium bowl, whisk together the eggs, milk, crumbled Boursin, lemon zest, lemon juice, herbs, a pinch of salt and pepper until smooth but not overly frothy. Stir in the prosciutto pieces.
Pour the egg mixture over the asparagus in the skillet. Let cook 2-3 minutes to set the edges, then transfer to the oven.
Bake 12-15 minutes until golden at the edges and just set in the middle.
Sprinkle with fresh herbs, lemon zest, or a pinch of salt before serving to finish.