A very quick and easy way to cook mushrooms is to fill the big portobello mushrooms. Be creative, you can fill them with anything; spinach, curd, cheese, avocado or like me, with a caprese filling.
Believe me, it's very little work!
And this I found in the internet: "The super-sized portobello mushrooms have a XXL effect on well-being. They promote night vision, alleviate iron deficiency and stress, strengthen bones, heart and blood vessels, and are ideal for women with children or while breastfeeding."
Salt and Pepper
Remove the stems.
You can also remove the black inside of the mushroom if you wish, some say, they retain water.
This can be a full meal or a starter.