Caramelized Onion Quiche

Ingredients (15)

• Quiche Crust (From Bittman's How to Cook Everything):
• Makes 2 shells
• 2 1/4 Cups all-purpose flour, plus a bit for rolling
• 1 Teaspoon salt
• 1 Cup (2 sticks) unsalted butter, cold and chopped up
• 6 Tablespoons of water (approximately)
• Filling:
• Makes 1 quiche (double for two)
• 3 large onions, sliced thinly
• 4 Tablespoons butter or oil
• 5 eggs, room temperature
• 3/4 Cup heavy cream, slightly warm
• 3/4 Cup milk, slightly warm
• Salt and pepper
• 1 Teaspoon fresh thyme or 1/2 Teaspoon dried (kinda optional)