Coat the potatoes with olive oil and bake at 350 degrees for 30-45 minutes until fully cooked.
In a large mixing bowl, scoop out the center of the potatoes and discard the skin. Add the egg yolk and sifted flour, then mix until a dough is formed.
Take a large baking sheet and sprinkle it with semolina flour. Roll out the gnocchi dough into ropes about half an inch in diameter.
Cut the homemade gnocchi rope into pieces around an inch in length. Keep dusting the gnocchi with the semolina flour to avoid it from becoming tacky.
Roll the one-inch pieces of gnocchi over a gnocchi board with your thumb to obtain the desired shape. Let the gnocchi air dry for around 30 minutes.
In a large pot of salted boiling water, cook the gnocchi until they float. Then drain and remove.
Serve with your favorite sauce, such as marinara, tomato, vodka, or alfredo. Top with grated Locatelli or your favorite Italian cheese. "Mangiamo" - you have an awesome homemade gnocchi dish !
