French Onion Chicken Skillet Recipe- Ready in One Pan!

Ingredients

• 2 large Sweet Onions (sliced and cut in half)
• 4 Tablespoons Butter
• (1) 14-ounce can Beef Broth
• 3 Chicken Breasts (pound to uniform size if needed)
• 2 Tablespoons Olive Oil
• 1-2 teaspoons Salt
• 1 teaspoon Pepper
• 1 teaspoon Thyme
• 1 1/2 Tablespoon Cornstarch (or Flour)
• 3 Slices Provolone Cheese
• 3 Slices Mozzarella Cheese