Roasted Asparagus with Balsamic Browned Butter

Bahan-bahan (8 porsi)

• 40 whole spears asparagus
• ¼ teaspoon kosher salt
• ⅛ teaspoon black pepper
• 2 tablespoons butter
• 2 teaspoons low-sodium soy sauce
• 1 teaspoon balsamic vinegar