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Vegetarian Butternut Squash and Swiss Chard Polenta Lasagna Recipe

A vegetarian lasagna recipe made with butternut squash, Swiss chard, herbed ricotta, and Gruyère cheese and instead of pasta noodles, it's layered with polenta.

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Why it works: Butternut squash and chard share more aroma than cooks usually use. They rank in the top 1% of all ingredient pairs, and 14 recipes mention both. Both carry coumarin, which smells sweet, hay. The science ↓

The recipe

6 to 8 servings
Cook2 hr 30 min

Ingredients

Contains: egg, milk (auto-detected from the ingredients and method; we can miss things, so check labels)

Directions

Method written by CompKitchen from the ingredient list. Not the original author's method, not kitchen-tested.

  1. Heat the oven to 400°F (204°C). Peel the butternut squash, halve it, scoop out the seeds and cut the flesh into 1/2-inch cubes. Toss with 2 tablespoons olive oil and 1/2 teaspoon kosher salt, spread on a baking sheet and roast 35 to 40 minutes until tender. Lower the oven to 375°F (190°C).

  2. Bring the water, whole milk and 1 teaspoon kosher salt to a simmer in a large heavy pot. Slowly whisk in the polenta, lower the heat and cook, stirring often, 25 to 30 minutes until thick. Add a splash of water if it gets too stiff. Season with black pepper and stir in 1 cup Gruyère. Keep warm.

  3. Heat 2 tablespoons olive oil in a large skillet over medium heat. Cook the shallot, rosemary and thyme 4 to 5 minutes until soft. Add the chard and the white wine, cover and cook 5 to 8 minutes until the chard wilts and the liquid has evaporated. Season with salt and pepper and let cool slightly.

  4. In a bowl, mix the ricotta, egg, Asiago and 1/4 teaspoon kosher salt with a generous grind of black pepper until smooth.

  5. Grease a 9x13-inch baking dish with 1 tablespoon olive oil. Spread half the polenta in the dish, then layer half the roasted squash, half the chard and half the ricotta mixture. Repeat with the remaining polenta, squash, chard and ricotta mixture.

  6. Sprinkle the remaining 1/2 cup Gruyère over the top. Bake at 375°F (190°C) about 40 minutes, until bubbling and the egg in the ricotta layer is set and reaches 160°F (71°C) in the center.

  7. Let the lasagna rest 15 minutes before cutting into squares and serving.

By chow. Recipe from Open Recipes.

Explore the science

The flavor team

The pairs that carry this dish. Each one is judged two ways: how much aroma chemistry they share, and how many recipes mention both.

  1. Butternut squash + chardtop 1% of all pairs
    Aroma overlapstrong
    Mentioned together14 recipes

    Shared aroma: coumarin (sweet, hay).

  2. Rosemary + thymetop 1% of all pairs
    Aroma overlapstrong
    Mentioned together1,340 recipes

    Shared aroma: beta-phellandrene (minty, terpene).

  3. Olive + rosemarytop 3% of all pairs
    Aroma overlapstrong
    Mentioned together2,489 recipes

    Shared aroma: eucalyptol (eucalyptus, herbal).

  4. Rosemary + peppertop 3% of all pairs
    Aroma overlapstrong
    Mentioned together2,324 recipes

    Shared aroma: estragole (anise, licorice).

  5. Thyme + peppertop 3% of all pairs
    Aroma overlapstrong
    Mentioned together11,585 recipes

    Shared aroma: beta-phellandrene (minty, terpene).

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

Flavor stand-ins for the shallot

How well each one fits the dish's main ingredients (olive, rosemary, thyme, milk, butternut squash, pepper, cheese):

  1. Tomatobetter flavor fit
  2. Potatobetter flavor fit
  3. Capsicumbetter flavor fit
  4. Shallotthe original

Fit is the average pairing score against olive, rosemary, thyme, milk, butternut squash, pepper, cheese. Candidates are from the same food group and used in at least 100 recipes. This compares flavor only: it does not check the job the ingredient does in the dish (bulk, moisture, acidity, structure).