Leek and Gruyère Quiche - Forks 'n' Flip Flops

Ingredients

• 1 cup all-purpose flour
• 6 tablespoons (3/4 stick) cold unsalted butter cut into 1/2-inch pieces
• 1/8 teaspoon salt
• 1/4 teaspoon sugar
• 3 tablespoons ice-cold water
• 1 large or small leeks, trimmed (leaving mostly green, split, washed, and thinly sliced ((two cups))
• 1/2 teaspoon salt
• 1/2 teaspoon freshly ground black pepper
• 1 1/2 cup grated Gruyère cheese ((5 ounces) )
• 4 large eggs
• 1 1/4 cups milk
• 1/4 cup heavy cream