Preheat your oven to 400 degrees. Prepare two baking sheets.
Wash your portobello mushroom caps. Remove the stem and use a spoon to scrape out the gills. Brush the outside of the mushroom cap with olive oil and place on a baking sheet.
Place your greens in the mushrooms.
Press prosciutto slices around the edges of the cap.
Crack your egg and place it on top of the prosciutto. Sprinkle with salt and pepper.
Place both baking sheets in the oven. Bake for 15 to 20 minutes.
Notes
This recipe is 6 Green or 4 Blue and Purple WW points.