Miso-Mushroom Pasta

Name: Miso-Mushroom Pasta
Cuisine: Asian
Ingredients: 7 ounce dried pasta, such as bucatini; 4 ounce mushrooms (I use an equal mix of shimeji, eryngii, and oyster mushrooms, but most other combinations are good too); 2 tablespoon vegetable oil; 1 teaspoon sherry vinegar, or white wine vinegar; 2 teaspoon red miso paste; 3 tablespoon butter, softened; 5 garlic cloves; 1/2 cup heavy cream; 1 stalk of scallion, finely sliced; 1 pinch salt; 1 pinch black pepper