The perfect appetizer for brunch!
Preheat oven to 350 degrees F.
Melt the butter in a sauté pan. Add the onion and sauté for approximately 5 minutes. Add the garlic and sauté another minute. Set aside to cool.
In a large bowl, whisk the eggs and mix in the ricotta, mozzarella, and Parmesan. Stir in the sriracha and season with salt and pepper. Stir in the chopped spinach and cooked onion and garlic and combine well.
Butter or spray a 24-cup mini muffin pan and fill with spinach mixture. If desired, sprinkle the spinach bites with freshly grated Parmesan cheese.
Bake for 20-25 minutes.