<human>:  What is the best way to make a vegan quiche?
<bot>: The best way to make a vegan quiche is to use vegan-friendly ingredients such as a vegan buttery spread or coconut oil, plant-based milk such as soy, almond, or coconut, vegan cheese, and a vegetable-based filling such as mushrooms, spinach, or bell peppers. You can then combine these ingredients with ingredients such as eggs, flour, nutritional yeast, spices, and herbs to make a vegan quiche that is flavorful and filling.