Preheat oven to 350°
Grease or line a standard muffin tin or glass oven safe meal prep containers and set aside for now
In a large bowl, whisk 8 large eggs with 1/2 cup of your favorite milk, 1 teaspoon dried Italian herbs, 1/2 teaspoon of salt and a pinch of black pepper and set aside for now
Place a large skillet over medium heat and add a light drizzle of a neutral oil
Add the sliced onions and mushrooms and cook, stirring occasionally, for 5-7 minutes or until softened
Add the softened onions and mushrooms and 1/2 cup of shredded gouda into the egg mixture and mix to combine
Divide the mixture evenly into the greased muffin tin or oven safe meal prep containers
Bake in a 350° oven for 20-25 minutes (depending on your container size) or until the center looks set
Enjoy warm or chill in airtight containers until ready to serve