Heat coconut oil in a frying pan and sauté leek and mushrooms until soft. 

Add your add-ins of choice and cook just until incorporated. (For a variety, divide the leeks and mushrooms up and sauté each portion with different veggie combos.)

Preheat oven to 400°F (200°C). Generously grease as many ramekins as you want to prepare.

Multiplying amounts as needed, whisk together eggs, coconut oil, and vegetables.

Season to taste with salt, pepper, and herbs of choice.

Stir in the leeks and mushrooms, with the add-ons if desired.

Divide evenly among ramekins and bake for 25 minutes.Best enjoyed fresh, but can be refrigerated for up to four days, then served rewarmed or at room temperature.