Spinach & Mushroom Quiche

Loaded with antioxidant-rich veggies, this Spinach & Mushroom Quiche is filling and flavorful. Deep earthy mushrooms and emerald green spinach are complemented by sweet onions, spicy garlic and herby thyme. Protein-rich eggs and melty Gruyère cheese provide the foundation that brings all the flavors together. Having no crust keeps this quiche low-carb. Keep reading for our expert tips, including options you can use to tweak this recipe and make it your own.

Tips from the EatingWell Test Kitchen

These are the key tips we learned while developing and testing this recipe in our Test Kitchen to make sure it works, tastes great and is good for you too! 

• Frozen spinach is a good alternative to fresh as long as it is thawed and squeezed dry.
• Sweet onions, such as Vidalia onions, are milder and sweeter than regular onions. If you don't have a sweet onion, you can use a white onion or yellow onion as a substitute in this recipe because they taste milder when cooked.
• You can use whole milk instead of half-and-half. Because whole milk has less fat content than half-and-half, the quiche will be slightly less creamy, but it won't affect the flavor.
  
• Gruyère cheese is a hard cheese from Switzerland with a mild, nutty flavor and creamy texture that melts well. If you prefer, you can swap out the Gruyère with another type of shredded cheese, such as Swiss, Gouda or Cheddar.

Nutrition Notes

• In the past, eggs were controversial due to their cholesterol content, but we now know that the cholesterol in the foods we eat only minimally impacts our blood cholesterol. Eggs are a good source of protein—and almost half of an egg's protein is in its yolk. The yolk is also a source of many other nutrients, including iron, vitamin B12, vitamin D and choline.
• Mushrooms are filled with earthy goodness, including fiber, antioxidants, B vitamins, plant protein and vitamin D. Mushrooms also contain the mineral selenium, which acts as an antioxidant to reduce inflammation and disease. The fiber in mushrooms helps feed your gut's beneficial bacteria.
• Spinach is loaded with vitamin A and the antioxidants lutein and zeaxanthin. This means that regularly eating spinach may help support your eye and skin health. You may also have a stronger immune system and heart. And the vitamin K in spinach supports strong bones.