Philly Cheesesteak Soup

Bahan-bahan (8 porsi)

• 8 slices baguette
• ⅓ cup butter
• 1 large onion (diced)
• 3 ribs celery (sliced)
• 1 ½ cups sliced mushrooms
• 1 g reen bell pepper (sliced)
• ⅓ cup all-purpose flour
• 1 ½ tablespoons Worcestershire sauce
• 4 dashes hot sauce (such as tabasco)
• 4 cups beef broth
• 1 cup half and half (or light cream)
• 8 ounces provolone cheese (shredded, divided)
• 6 ounces cheddar cheese (shredded)
• 1 pound top round steak (thinly sliced, see note below)