If you can’t find no-boil noodles, just use regular lasagna noodles and follow the cooking instructions on the package before layering. And while there are specific instructions on how much squash and ricotta to use while layering and assembling, I think the best part about making a lasagna is going pretty free-form; just make sure everything gets in amongst the layers and it will taste great. As for the cook time above, I factored in all the elements you’ll cook, from onions to squash to the lasagna itself.
Recipe Slightly Adapted From: At Home in the Whole Food Kitchen
Necessary Equipment: 8 x 12 inch or 9 x 13 inch lasagna pan
Make the Squash Purée
Preheat the oven to 400 F. Line a large baking sheet with parchment paper. Cut neck off butternut squash, and cut in half lengthwise. Rub squash with olive oil and place cut-side down on parchment-lined tray. Roast for 50 minutes or until you can pierce the flesh easily with a knife. Remove from the oven and set aside to cool while you cook the onion. Once squash is cool enough to handle, scoop out seeds with a spoon and peel off skin. Compost seeds and skin. Add squash to food processor with salt and a few grinds of pepper and blend until completely smooth. Sprinkle in Parmesan cheese and blend until incorporated. Scoop into a bowl and set aside. Rinse out food processor as you’ll use it again for the tofu ricotta.
Caramelize the Onions:
Warm oil in a large skillet over medium heat; add onions. Sauté for 10 minutes or until beginning to brown. Add salt, lower heat slightly and continue cooking for 20 minutes, or until onions are soft and caramelized. Remove from heat and set aside.
Make the Tofu Ricotta:
Place the toasted cashews in the food processor and process until fine and dusty (but be careful not to overprocess; don’t allow it to turn into a nut butter).
Add 1/2 the caramelized onions (reserve the rest to layer into the lasagna) to the food processor and crumble the tofu in as well. Add the brown rice vinegar, salt, pinch of black pepper. The food processor will be very full — that’s o.k.
Next, warm olive oil in a small pot over medium heat. Add garlic, reduce heat a little and gently simmer until soft and golden, about 8-10 minutes. Remove from heat; add to food processor. Blend all ingredients until smooth, scraping down sides as necessary. Add chopped sage and process until incorporated. Scoop mixture into a bowl; set aside a heaping 1/2 cup for garnishing the top of the lasagna.
Preheat the oven to 375 F. Brush lasagna pan with olive oil. Spread 3/4 cup squash purée over bottom of pan and top with a single layer of noodles, then top with half of tofu ricotta. Repeat with another layer of noodles, and another 1 1/2 cups squash purée. Spread caramelized onions over squash and top with a final layer of noodles. Cover with remaining tofu ricotta, and top with remaining squash purée. Spoon 8 dots of reserved tofu ricotta evenly over the top, press a sage leaf into each one, and sprinkle with freshly ground black pepper.
Cover with parchment paper and then with foil; bake for 50-60 minutes or until noodles are tender and lasagna is heated through. To test, insert a knife into the center; you shouldn’t feel any resistance. If noodles are still firm, continue cooking covered for another 5-10 minutes. Remove cover, and bake additional 10 minutes, or until top layer of squash looks set. Remove from oven and allow to sit at least 10 minutes before cutting. Serve warm. Store any leftovers in an airtight container in the fridge for up to 4 days or wrap well and freeze.