Add the bagel, cut in half, to a baking sheet.
Top each with prosciutto, letting it be a cup to hold the egg inside the bagel hole.
Crack an egg on top of each bagel.
Add to an oven and bake on 350 for 5 to 10 minutes. Eggs should be cooked, maybe a little runny, but bagel and prosciutto should be crispy around the edges.
Remove from oven. Top with avocado, arugula and spicy Mayo. Serve with ketchup.