In a mixing bowl, combine the chopped spinach, artichoke hearts, Greek yogurt, cream cheese, mozzarella cheese, Parmesan cheese, garlic, salt, pepper, and red pepper flakes.
Mix until well combined.
Transfer the mixture to a baking dish and spread it evenly.
Bake for 20-25 minutes, or until the dip is hot and bubbly.
Serve warm with gluten-free crackers or vegetables.
Notes
For a creamier dip, add more Greek yogurt or cream cheese.
Can be made ahead of time and baked just before serving.
Adjust the spices according to your taste preference.