For the dough (flour, 2 eggs, olive oil, salt)
Mix all the dough ingredients, adding flour slowly. Mix with your hands for 10 minutes or until it is soft and smooth. Gather the dough into a ball and allow it to settle for 1 hour, covered with plastic wrap.
For the filling (St Marcelin, Gruyere,1 egg, butter, salt and pepper)
Mix all filling ingredients well with a fork. After 1 hour, roll the dough and cut into and equal number of small squares. Using half the squares, place the filling in the middle of each. Cover with a second slice of dough and press around edges.
Spread egg white with a pastry brush. Boil ravioli in salted water for 8 minutes.