Crispy Skillet Ravioli with Garlic-Butter Mushrooms

Name: Crispy Skillet Ravioli with Garlic-Butter Mushrooms
Prep time: 10 min
Cook time: 20 min
Total time: 30 min
Cuisine: European, Italian, Mediterranean
Ingredients: 1 pound cremini mushrooms; 5 cloves garlic; 1 sprig fresh rosemary; 2 ounces Pecorino Romano or Parmesan cheese, finely grated (about 1 firmly packed cup or 2/3 cup store-bought); 4 tablespoons unsalted butter, divided; 1/2 teaspoon kosher salt; 1/4 teaspoon red pepper flakes, plus more for serving; 1 tablespoon balsamic vinegar; 1 tablespoon olive oil; 2 (9 or 10-ounce) packages or 1 (20-ounce) package fresh or frozen cheese ravioli; 1/2 cup water