Lemon-Thyme Spinach

Bahan-bahan (4 porsi)

• 3 tablespoons unsalted butter, (at room temperature)
• 2 teaspoons fresh thyme, (coarsely chopped)
• 2 teaspoons lemon zest, (finely grated)
• ½ teaspoon minced garlic
• kosher salt, (to taste)
• 1 pound fresh spinach, (stems removed)