For garnishing, sprinkle fresh chopped parsley, sliced green onions, or extra parmesan cheese after baking., Serve with crunchy pita chips, toasted baguette slices, or crisp vegetable sticks like carrots and celery., Leftovers can be stored in an airtight container in the refrigerator for up to 3 days, stirred before serving again., The dip freezes well for up to 2 months; thaw overnight in the refrigerator and reheat gently., To reheat, warm in the microwave at medium power or in a 350°F oven until hot and bubbly; adding extra cheese on top before reheating enhances melting., You can use fresh spinach instead of frozen, but cook it first and squeeze out excess water to avoid a watery dip., The dip is naturally gluten-free but verify labels of packaged ingredients to ensure., For a vegan/dairy-free version, substitute dairy ingredients with plant-based alternatives, noting texture and taste will differ., Add red pepper flakes or hot sauce if a spicier dip is desired., To clean the baking dish easily, soak it in warm soapy water immediately after use.