This shredded zucchini frittata is the perfect summer breakfast casserole. It’s super tasty and easy to make. Skip the stovetop–this frittata is fully oven-baked. Packed with fresh zucchini, shiitake mushrooms, and basil, this healthy frittata recipe is perfect for brunch or make-ahead weekday breakfast. Plus, it’s gluten-free, dairy-free and vegetarian.
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