"Baked polenta rounds sit under a creamy spinach Parmesan sauce...."
INGREDIENTS
•
Cooking spray or butter, for coating the baking dish
•
2 (18-ounce) tubes prepared polenta, cut into 1/4-inch-thick rounds
•
Freshly ground black pepper
•
1 (6-ounce) package baby spinach (about 6 loosely packed cups)
•
2 tablespoons unsalted butter
•
1/2 medium yellow onion, diced
•
1 clove garlic, minced
•
1/2 teaspoon kosher salt, plus more for seasoning
•
2 tablespoons all-purpose flour or cornstarch
•
2 cups whole milk
•
1/2 cup grated Parmesan cheese, divided
•
2 teaspoons freshly squeezed lemon juice