French Onion Mac and Cheese Recipe

Ingredients

• 2 tablespoons olive oil
• 2 tablespoons butter
• 3 medium onions, thinly sliced
• 1 tablespoon cider vinegar
• 1/2 teaspoon salt
• 1/4 teaspoon pepper
• MAC AND CHEESE:
• 1 pound uncooked elbow macaroni
• 1/4 cup butter
• 1/4 cup all-purpose flour
• 2-1/2 cups whole milk
• 1/2 cup reduced-sodium beef broth
• 1 cup shredded Swiss cheese
• 1-1/2 cups shredded Gruyere cheese
• 1 teaspoon Worcestershire sauce
• 1 teaspoon salt
• 1/2 teaspoon pepper
• 1/4 teaspoon garlic powder
• 1/4 teaspoon dried thyme
• 1/2 cup shredded Parmesan cheese
• 1 cup french-fried onions, optional