Truffled Creamed Spinach

Ingredients

• 2 lb spinach
• 3 tablespoons unsalted butter
• 2 cloves garlic, sliced thin
• 3 tablespoons all-purpose flour
• 1 1/2 cup whole milk
• 1/4 cup Gruyere cheese, freshly grated
• 1 1/2 ounces black truffles