Fresh Green Bean Casserole

Bahan-bahan (8 porsi)

• 4 -5 cups green beans (ends removed and cut into ½" pieces)
• ½ cup diced red bell pepper
• ¼ cup shredded Parmesan cheese
• ½ cup shredded cheddar cheese (divided)
• ½ small onion (finely diced)
• ¾ cup mushrooms (about 4-5 mushrooms, finely chopped)
• 2 tablespoons butter
• 2 tablespoons all-purpose flour
• salt and pepper to taste
• ½ cup heavy whipping cream
• 1 cup milk
• 1 teaspoon soy sauce
• 1 tablespoon melted butter
• ½ cup Panko bread crumbs
• ½ cup shredded cheddar cheese