Ingredients

  • 1 pound spinach, stemmed and washed in 2 changes water if using bunch spinach, rinsed if using bagged baby spinach
  • Salt
  • 2 tablespoons extra virgin olive oil, plus additional for oiling baking dish
  • 1/2 pound wild mushrooms, such as oyster mushrooms or maitakes, torn or cut into smaller slices if large or in clumps
  • 2 garlic cloves, minced
  • 1 teaspoon fresh thyme leaves
  • 8 ounces ricotta cheese
  • 1 egg
  • 1 tablespoon water
  • Pinch of nutmeg
  • Salt and freshly ground pepper
  • 2 13 to 2 1/2 cups marinara sauce (more to taste)
  • 7 to 8 ounces no-boil lasagna (depends on the size and shape of your dish)
  • 4 ounces (1 cup) freshly grated Parmesan

Method

  • Heat a large frying pan over high heat and add the wet spinach.
  • Wilt in the water left on the leaves, stirring until all of the spinach has collapsed in the pan.
  • Transfer to a bowl of cold water, then drain and squeeze out excess water, taking up spinach by the handful.
  • Chop fine and season with a little bit of salt.
  • Set aside.
  • (Alternatively, blanch for 20 seconds in salted boiling water).
  • Clean and dry skillet and heat 1 tablespoon olive oil over high heat.
  • Add mushrooms.
  • Let sear without moving for about 30 seconds, then toss and stir in the pan until they begin to sweat, 2 to 3 minutes.
  • Turn heat to medium and add minced garlic and thyme.
  • Season with salt and pepper and continue to cook over medium heat until mushrooms are soft, 3 to 5 more minutes.
  • Taste and adjust seasoning.
  • Remove from heat.
  • Heat oven to 350 degrees.
  • Lightly oil a rectangular baking dish.
  • Blend ricotta cheese with egg, water, nutmeg, and salt and pepper to taste.
  • Stir in spinach.
  • Spread a small spoonful of marinara sauce in a thin layer over the bottom of the baking dish.
  • Top with a layer of lasagna noodles.
  • Top the noodles with a thin layer of ricotta.
  • Spoon on a few dollops then spread it with an offset or rubber spatula.
  • Top ricotta with half the mushrooms, then top with a layer of marinara sauce and a layer of Parmesan.
  • Repeat layers, then add a final layer of lasagna noodles topped with marinara sauce and Parmesan.
  • Drizzle on remaining olive oil.
  • Cover baking dish tightly with foil and place in the oven.
  • Bake 40 minutes, until noodles are tender and mixture is bubbling.
  • Remove from heat and allow to sit for 5 to 10 minutes before serving.