This rich and creamy gratin is packed with hearty greens and topped with buttery Parmesan breadcrumbs. The recipe is a Yummly original created by Sara Mellas.
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- Preheat oven to 350°F.
- Spray a 9-inch square baking dish with cooking spray. Set aside.
- In a large pot over medium heat, melt the butter. Once melted, add onion. Saute for 4-5 minutes, until softened. Add garlic and continue to cook for 30 seconds more, until fragrant.