01 - Mound the flour on a clean work surface and create a deep well in the center. Crack the eggs into the well and add the salt. Beat the eggs gently with a fork, gradually pulling in flour from the inner walls until a shaggy dough forms. Knead firmly for 7 to 8 minutes until the dough is smooth, elastic, and springs back when pressed. Wrap tightly in plastic wrap and let it rest at room temperature for 20 minutes.
02 - In a mixing bowl, combine the finely chopped chicken breast, ricotta cheese, grated Parmesan, minced garlic, chopped parsley, ground nutmeg, and a generous pinch of salt and pepper. Stir until all ingredients are evenly distributed and the mixture holds together when pressed.
03 - Unwrap the rested dough and divide it into manageable portions. Roll each portion out to approximately 1/16-inch thickness using a rolling pin or pasta machine. Cut the sheet into 2-inch squares or circles using a knife or pasta cutter. Place a small spoonful of filling in the center of each piece, fold the dough over to form a triangle or half-moon, press the edges firmly to seal out any air, then bring the two bottom corners together and pinch to form the classic tortellini shape.
04 - Bring a large pot of generously salted water to a rolling boil. Carefully drop the tortellini into the water in batches to avoid crowding. Cook for 3 to 4 minutes or until they float to the surface and the pasta edges are tender. Remove with a slotted spoon and transfer to a warm plate.
05 - In a saucepan over medium heat, melt the butter until it begins to foam. Pour in the heavy cream and bring to a gentle simmer for 2 to 3 minutes, stirring occasionally. Stir in the grated Parmesan cheese and continue stirring until fully melted and the sauce is smooth. Season with freshly ground black pepper to taste.
06 - Gently toss the cooked tortellini in the cream sauce until each piece is evenly coated. Transfer to warmed serving plates or bowls, garnish with additional grated Parmesan and freshly chopped parsley, and serve immediately.