Heat oven to 350°F. Place pie shell in a baking dish. Bake for 10 minutes and remove from oven and set aside.
In a sauté pan add a few drizzles of olive oil and bring to medium heat. Add in mushrooms and onions and cook a few minutes. Add in spinach and sundried tomatoes and cook until spinach is wilted. Sprinkle with salt and pepper.
In a bowl whisk together eggs and milk. Season with salt and pepper. Stir in crumbled goat cheese.
Layer the cooked veggies on the bottom of the pie shell. Then pour the egg mixture over.
Bake at 350°F for 30 minutes.