1. Preheat the Oven: Begin by preheating your oven to 350°F (175°C) and prepare your muffin tin by greasing it or using silicone muffin cups.
2. Prepare the Spinach: Thaw the frozen spinach and make sure to squeeze out any excess moisture. Chop it finely to prevent clumps.
3. Sauté the Spinach: In a skillet or frying pan, heat a small amount of oil over medium heat. Add the chopped spinach and sauté for a few minutes until it's wilted and any remaining moisture has evaporated. Remove it from the heat and allow it to cool.
4. Combine Ingredients: In a mixing bowl, beat the eggs thoroughly. Add the crumbled feta cheese, heavy cream, salt, black pepper, and ground nutmeg. Mix everything together until well combined.
5. Add Spinach: Gently fold the sautéed spinach into the egg mixture. Ensure an even distribution of spinach throughout the mixture.
6. Fill the Muffin Tin: Using a ladle or a measuring cup, carefully pour the quiche mixture into the prepared muffin tin, dividing it equally among the cups.
7. Bake: Place the muffin tin in the preheated oven and bake for approximately 20-25 minutes or until the quiches are set and slightly golden on top.
8. Cool and Serve: Once done, remove the Mini Spinach Feta Quiches from the oven and allow them to cool in the tin for a few minutes. Use a knife or a small spatula to gently lift them out of the cups. Serve them warm and enjoy!