Instructions
Preheat oven to 350F (180C). Whisk together eggs, milk and salt in a mixing bowl. Set aside.
Heat olive oil in a frying pan over medium heat. Add onion and mushroom, sauté for 5 minutes.
Add garlic and sauté for 1 minutes. Add spinach and sauté until spinach starts to wilts and turns a bright green colour, about 1 minute. Remove from heat and add to egg mixture. Mix well.
Line muffin tray with parchment paper cups. Fill each parchment paper 3/4 of the way with egg mixture. Leave room at the top to allow the egg to rise.
Bake for 20 minutes. Remove from oven and let cool before removing from tin.
