Bring a large pot of water to a boil and salt well (should taste like the sea). In a large bowl, combine ricotta cheese, eggs, parmesan, a pinch of salt and several turns of ground black pepper. Add 1/2 cup flour and stir. Continue to add flour (a little at a time) until the dough comes together (will be fairly sticky). Using a spoon, scoop a small bit of dough (about 1 teaspoon) and drop it into the boiling water. If the gnocchi holds it's shape, then you have added just the right amount of flour. If you see bits shedding off of the gnocchi, then you need to add more flour to the dough. Stir in a bit more flour and repeat the testing process above till your gnocchi holds together.