Dreamy Red Wine Pasta

Ingredients (8)

• 3 tablespoons butter
• 1 garlic clove, minced
• 1/4 teaspoon red pepper flakes
• 1 pound thin spaghetti
• 2 cups dry red wine such as Chianti or zinfandel (about 3/4 bottle)
• Salt and fresh ground pepper
• 1/4 cup pistachios, toasted and roughly chopped
• Parmigiano-Reggiano cheese, for serving