Preheat oven to 350 degrees F.
Place arugula in a food processor fitted with the S blade and pulse until finely minced.
Combine minced arugula with Cashew "Ricotta Cheese" and stir to mix well.
Add about 1 cup of Lentil Bolognese Sauce to a 9x13 baking dish and spread to cover the bottom.
Place 3 uncooked lasagna noodles on top of the sauce. (Leave a little space around each noodle – they will expand.)
Spread ⅓ of Cashew "Ricotta Cheese" mixture on top of lasagna. (I find it helpful to hold a lasagna noodle in one hand while I spread the cheese on with the other hand—this is the reason why I like to use uncooked noodles.)
Spread about 1½ cups of the Lentil Bolognese Sauce over the cheese covered noodles.
Sprinkle about ¼ cup of Diaya shreds over sauce if desired.
Repeat steps 5 through 8 two more times.
Place the final 3 lasagna noodles on top of the last layer. Top with remaining sauce and Diaya shreds.
Sprinkle ¼ cup of Vegan Parmesan over the top and cover tightly with aluminum foil.
Bake covered for 1 hour and 15 minutes at 350 degrees F or until sauce is bubbling and top noodles appear tender in the center of the pan.
Remove foil and bake uncovered for 15 minutes more.
Remove from oven and let rest uncovered for at least 15 minutes before serving.