To start, you will need to prepare the puff pastry. This can be done using store-bought puff pastry, which can be found in the freezer section of most grocery stores. Simply thaw the puff pastry according to the package instructions.
Next, prepare the filling. Lentils are the perfect choice for this dish, as they are hearty and filling. To cook the lentils, rinse them thoroughly and then place them in a pot with enough water to cover them. Bring the water to a boil and then reduce the heat to a simmer. Cook the lentils until they are tender, which will take approximately 20-30 minutes.
While the lentils are cooking, prepare the cotechino. Cotechino is a traditional Italian sausage that is often served with lentils. To prepare the cotechino, you will need to first remove it from its casing. Once the casing is removed, slice the cotechino into pieces that are approximately 1/4 inch thick.
Once the lentils are cooked, drain them and then add them to a large bowl. Add the sliced cotechino to the bowl, along with some chopped parsley and grated Parmesan cheese. Mix the filling together until it is well combined.
Next, roll out the puff pastry into thin sheets. Cut the pastry into rounds using a cookie cutter or a small bowl. Spoon a small amount of the lentil and cotechino filling onto one half of each pastry round. Brush the edges of the pastry with a beaten egg and then fold the other half of the pastry over the filling, creating a half-moon shape. Use a fork to seal the edges of the pastry together.
Once all of the pastry rounds have been filled and sealed, place them on a baking sheet lined with parchment paper. Brush the tops of the pastry with beaten egg and sprinkle with additional grated Parmesan cheese and chopped parsley.
Bake the puff pastry ravioli in a preheated oven for approximately 15-20 minutes, or until they are golden brown and puffed up.
Serve the puff pastry ravioli with lentils and cotechino hot, topped with more grated Parmesan cheese and chopped parsley. This dish is perfect for a cozy winter evening and is sure to impress your family and friends.