One-Pot French Onion Pasta

Name: One-Pot French Onion Pasta
Prep time: 20 min
Total time: 20 min
Cuisine: American, French
Ingredients: 5 tbsp. olive oil, divided; 2 tbsp. unsalted butter; 4 medium yellow onions, thinly sliced; 2 tsp. kosher salt, divided; 1/2 tsp. freshly ground black pepper; 8 oz. baby bella mushrooms, sliced; 5 sprigs fresh thyme, plus more for garnish; 5 garlic cloves, minced; 1 c. dry white wine; 4 c. beef broth; 1 tbsp. Worcestershire sauce; 1 lb. farfalle pasta; 2 oz. cream cheese; 1 tbsp. red wine vinegar; 5 oz. thinly sliced French bread (about 3 1/2 cups), torn in half; 1 c. shredded low-moisture mozzarella cheese; 1/2 c. shredded gruyere cheese