Pre-heat oven to 350’F
Spray a glass deep dish pie pan with non-stick spray
Heat olive oil in a sauté pan over medium-high heat
Add onion and mushroom, cook until soft
Place cooked onion and mushroom into the bottom of the prepared pie pan
Top with dairy-free cheese shreds
In a bowl, whisk together eggs, dairy-free milk, gluten-free flour and seasoning
Pour over onions in baking dish
Cook for 30 minutes
Make sure it doesn’t get overly browned, if edges start to brown too much, cover with foil
When center is set, remove from oven and let sit for a few minutes
Serve while hot