Preheat your oven to 375°F / 190°C.
Cook the lasagna noodles according to package directions until al dente.
Drain them well, rinse with cold water to stop the cooking process, and drain again. Carefully lay the cooked noodles in a single layer on a sheet of foil to prevent them from sticking together.
While the noodles cook, prepare the filling.
In a large bowl, combine the softened cream cheese, shredded Italian cheese blend, crumbled Gorgonzola, 3/4 cup (960 ml) of the toasted walnuts, and the fresh or dried basil.
Mix until everything is well combined into a rich, creamy filling.
It's time to assemble!
Spread the cheese mixture evenly over each of the cooked lasagna noodles. Starting from a short end, carefully roll up each noodle into a neat spiral.
Place the lasagna rolls seam-side down in an ungreased 2-quart rectangular baking dish.
Pour the tomato-basil pasta sauce evenly over the top of the rolls.
Cover the dish with foil and bake for about 40 minutes, or until the sauce is bubbly and the rolls are heated through.
Remove from the oven and sprinkle the rolls with the remaining 1/4 cup (960 ml) of toasted walnuts. If desired, garnish with a sprinkle of shredded fresh basil and a crack of freshly ground black pepper. To serve, place a bed of fresh spinach on each plate, top with the lasagna rolls, and spoon some of the extra sauce from the dish over the top.
Don't skip toasting the walnuts! It deeply enhances their nutty flavor and adds a superior crunch. Simply spread them on a baking sheet and bake at 350°F / 175°C for 5-7 minutes, or toast in a dry skillet over medium heat until fragrant.