Pasta Bawang Perancis

Bahan-bahan (6 porsi)

• 2 large yellow onions
• ¼ cup butter
• 3 teaspoons minced garlic
• 8 ounces mushrooms, (sliced)
• 1 tablespoon fresh thyme, (plus more for serving)
• ¼ cup all-purpose flour
• ½ cup white wine
• 5 cups beef broth
• 16 ounces rigatoni, (uncooked)
• 1 tablespoon Worcestershire sauce
• ½ cup grated parmesan cheese, (plus more for garnish)
• salt and pepper (to taste)