INGREDIENTS
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3 large shallots, peeled and cut into 1/2-inch-thick slices
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2 pounds baby pattypan squash
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3 tablespoons olive oil, divided
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3/4 teaspoon kosher salt, divided
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3/4 teaspoon black pepper, divided
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2 pints cherry tomatoes
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1/4 cup chopped fresh basil
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2 tablespoons chopped fresh chives
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2 teaspoons minced fresh garlic
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3 1/2 cups fat-free, lower-sodium chicken broth
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5 tablespoons all-purpose flour
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1/4 cup heavy whipping cream
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1 1/2 tablespoons Dijon mustard
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1 large egg, lightly beaten
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Cooking spray
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9 cooked lasagna noodles
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1 1/2 ounces grated fresh Parmigiano-Reggiano cheese (about 1/3 cup)
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3 ounces fontina cheese, shredded (about 3/4 cup, packed)
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2 tablespoons torn fresh basil