If you really want to improve the quality of your homemade quiche, use mayonnaise. This seasoning improves the texture of the quiche. Because quiche is an emulsion. That is, its main ingredients – lemon, egg yolk, oil and vinegar – usually cannot be mixed together, but are dispersed evenly throughout the mixture with a quick whisk or blend. Emulsions are creamier and thicker than other sauces, so they stick to other ingredients more easily. For a quiche, this means that the rich mayonnaise is completely incorporated into the eggs and cream, adding fat to enhance the flavor.
Adding a little mayonnaise will smooth out the texture of the eggs and give you a light and fluffy filling. Observing the ratio of cream and eggs prescribed in the recipe, add 1 tablespoon of mayonnaise and whisk. Then add your fillings and bake your pie as usual. When the quiche comes out of the oven, it will have a uniform, fluffy texture throughout.