Preheat oven to 450 degrees F. Lightly spray baking sheet with olive oil.
Hollow out an indentation in each toasted bread slice large enough to hold two egg yolks. Leave a sufficient cushion of bread surrounding the indentation to avoid leakage. Place the bread on prepared baking sheet.
Carefully place two egg yolks in each bread indentation. Place the slices of the cheese over the entire slice of bread (to its edges).
Place the bread in the oven and bake for 12 minutes. During the last 2 minutes of baking, place grated Parmesan cheese on top of each toast. Remove from oven and, using a spatula, place each bread slice on an individual serving plate. Lightly drizzle the top with the truffle oil in a diagonal stream.
Serve immediately with salt and pepper at table and pass additional truffle oil, if desired. Sprinkle sliced asparagus spears on the place around the toast.
Makes 4 servings.
* Lightly toast the bread.
** Separate the eggs carefully so as not to break the yolks. Reserve the egg whites for another use.
Truffled Eggs Toast Recipe: https://whatscookingamerica.net/eggs/truffledeggstoast.htm