Preheat oven to 375°F. Generously grease the muffin tins with coconut oil or ghee.
Add 2 tbsp of coconut oil or ghee to a large skillet over medium heat and saute onions and peppers until softened, about 5 minutes.
Add the garlic and saute for an additional 1 minute. Finally, add greens and cook until wilted. Remove from the heat, then mix in basil and season with salt and pepper. Set aside to cool.
Whisk the eggs with the coconut milk, coconut flour, salt and pepper until frothy - an immersion blender helps makes an extra creamy texture. Add in the veggie mixture and stir well to combine.
Pour the frittata batter into the muffin tins then top with the cherry tomatoes. Bake for 18-20 minutes, turning the tray halfway through. Let them cool slightly in pan then transfer to a wire rack. Enjoy!