Step 1

First, make the ricotta and stir in the parsley, if using. Set aside.

Step 2

Preheat the oven to 375 degrees F, and lightly oil a glass or ceramic 9x13 baking dish.

Step 3

Cook lasagne noodles according to package directions. Note: feel free to cook 9 sheets instead of 12, and use 3 sheets per layer instead of Begin step 4 while the pasta water is heating.

Step 4

Preheat a large saute pan over low heat. Add the oil or broth and the garlic. Stirring frequently cook for 2 minutes. Transfer to a blender.

Step 5

Increase heat for the saute pan to medium. Cook the onion and mushrooms for 8 to 10 minutes or until dry. Season with a pinch of salt and pepper. Add the spinach and cook for 1 minute or until wilted.

Step 6

When the pasta is done, carefully drain. Lightly spray a plate or baking sheet with oil to prevent sticking. Use tongs to pick up each pasta sheet, and lay them out flat on the plate. Set aside.

Step 7

To the blender with the sauteed garlic, add the remaining sauce ingredients: milk, cashews, nutritional yeast, lemon, miso, salt, nutmeg, and black pepper. Blend on high speed until completely smooth. Taste and adjust the seasonings as desired.

Step 8

Assemble the lasagna: arrange 4 (or sheets of pasta in the bottom of the dish. Spread half of the ricotta on top, followed by half of the mushroom mixture. Spread 1 ¼ cups of the white sauce on top.

Step 9

Repeat the layers: pasta, the remaining ricotta, the remaining veggies, and 1 to 1 ¼ cups sauce (you should still have about 1 cup left for the top). Place a final layer of pasta on top, and completely cover it with the remaining sauce. Add black pepper (or crushed red pepper flakes), if desired.

Step 10

Bake uncovered for 15 minutes. Remove from oven and add the mozzarella evenly on top. Carefully (it's hot!) cover the entire dish with foil, as tightly as possible. This traps moisture and melts the cheese. Bake for another 25 minutes. Remove from the oven and let stand for 5 minutes. It's fine to take a peek under the foil and make sure the cheese has melted. Pop it back into the warm oven if needed.

Step 11

Uncover and let stand 15 minutes before slicing into 12 squares.