Keto Caramelized Onion and Gruyére Quiche with Almond Flour Crust - Zest Plate

Ingredients

• 1 1/2 cups almond flour
• 1/2 teaspoon garlic powder
• 1/4 teaspoon salt
• 1/4 cup (1/2 stick) butter, melted
• 1/4 cup (1/2 stick) butter
• 1 onion, thinly sliced
• 4 ounces Gruyére, grated
• 6 large eggs
• 2/3 cup heavy cream
• 1 teaspoon salt
• 1/2 teaspoon freshly ground black pepper