Jicama, Butternut Squash, and Pomegranate Au Gratin with Wild Mushrooms and Crispy Bacon

    Serves 7 (serving size: about 13 tablespoons)

    1½ tablespoons extra-virgin olive oil, divided

    1 thinly sliced green onion

    4 cups finely diced peeled butternut squash, divided (about 2 pounds)

    ⅜ teaspoon kosher salt, divided

    1 center-cut bacon slice

    2 ounces sliced chantarelle mushrooms

    2 ounces sliced shiitake mushroom caps

    ¾ tablespoon chopped fresh sage

    2 tablespoons unsalted beef stock (such as Swanson)

    1 ounce Parmigiano-Reggiano cheese, grated and divided (about ¼ cup)

    1½ cups julienne-cut peeled jicama (about ½ medium)

    1 tablespoon part-skim ricotta cheese

    ¼ cup pomegranate arils

    8 teaspoons vertically sliced red onion

⅛ teaspoon freshly ground black pepper

    2 tablespoons chopped fresh cilantro

    Cooking spray

    2 tablespoons fresh lime juice

    ½ tablespoon agave nectar

    3 ounces oyster mushrooms, sliced

    ⅛ teaspoon ground red pepper

1. Preheat oven to 350° F.
2. Heat a large skillet over medium-high heat.  Add ½ tablespoon oil; swirl to coat.  Add green onion; sauté 30 seconds.  Add 3 cups squash; sauté 2 minutes.  Reduce heat to medium-low, and stir in ⅛ teaspoon salt.  Cook, covered, 15 minutes or until tender.  Increase heat to medium-high.  Cook, uncovered, 2 minutes or until liquid evaporates, stirring frequently.  Place squash mixture in a large bowl; mash with a potato masher or fork until smooth.
3. Cook bacon in a large nonstick skillet over medium-high heat until crisp.  Remove bacon from pan, reserving drippings in pan; crumble bacon.  Add chantarelles, shiitakes, and sage to drippings; sauté 8 minutes or until mushrooms are browned.  Add stock; cook 3 minutes or until liquid almost evaporates.  Add mushroom mixture, remaining squash, ⅛ teaspoon salt, ½ ounce Parmigian-Reggiano cheese, jicama, ricotta cheese, pomegranate, red onion, black pepper, and cilantro to mashed squash mixture, stirring to combine.  Spoon squash mixture into a broiler-safe 11 x 7-inch glass or ceramic baking dish coated with cooking spray.  Cover with foil; bake for 1 hour.  Remove pan from oven; discard foil.
4. Preheat broiler to high.
5. Combine bacon, remaining Parmigiano-Reggiano, remaining oil, remaining salt, lime juice, nectar, oyster mushrooms, and red pepper in a bowl, stirring with a whisk; pour over gratin.  Broil 6 minutes or until lightly browned.  Let stand 5 minutes before serving.