My Favorite Spinach Quiche

From "365 Ways to Cook Vegetarian" by Kitty Morse.

• Ready In: 1 hr
• Serves: 6

Ingredients

• 3  tablespoons butter
• 1  onion, large, diced
• 1  cup mushroom, sliced
• 1 (10 ounce) package spinach, frozen, chopped and drained
• 3  eggs
• 1⁄2 cup milk
• 1  teaspoon dried thyme leaves
• 1⁄2 teaspoon dried tarragon
• 1  teaspoon salt
• 1⁄2 teaspoon pepper
• 1 1⁄2 cups gruyere, shredded
• 9  inches  pie crusts, thawed

Directions

1. Preheat oven to 375 degrees.
2. In a large frying pan, melt butter over medium-high heat. Cook onion, stirring occasionally, until soft, about 3 minutes. Add mushrooms and cook, stirring, until barely tender, 3 to 4 minutes. Add drained spinach and cook until moisture evaporates, 3 to 4 minutes. Set aside.
3. In a medium bowl, beat eggs lightly. Mix in milk, thyme, tarragon, salt, pepper, and Gruyere cheese. Add cooked spinach to egg mixture and stir to blend. Pour filling into pie crust.
4. Bake 25 to 35 minutes, until quiche is puffy and golden. Serve warm.