Easy Mussels in Marinara Recipe

Name: Easy Mussels in Marinara Recipe
Ingredients: 2 pounds mussels (cleaned, debearded, and soaked in cold water for 20 minutes to remove grit); 1 (28 ounce) San Marzano tomatoes, hand-crushed, discarding excess sauce; 1 medium scallion (finely chopped); 5 cloves garlic (minced); 1 teaspoon red chili flakes; 1/4 cup fresh basil leaves or parsley (chopped); 1/2 cup white wine (Sauvignon Blanc or Pinot Grigio); 2 tablespoons olive oil; 2 tablespoons unsalted butter; salt and pepper to taste; shaved Parmesan cheese (for topping); 1 loaf crusty bread (for dipping)