
Spinach mushroom quiche is a savory dish that has a stable, yet creamy filling featuring cooked vegetables and gruyere cheese on a partially baked pie crust.
Press pastry dough into a 9-inch quiche dish with a rim height of 1 1/4-inches (I love this quiche dish). Press the dough all the way up the sides, folding any overhanging dough in on itself (you can see photos on how to do this here).
In a skillet, melt butter over medium heat. Cook onion and mushrooms until tender, about 5 minutes. Add spinach and cook just until wilted. Remove from heat.