Making Southern Green Bean Casserole is straightforward if you follow these steps:

1. Preheat Oven: Start by preheating your oven to 350°F (175°C).

2. Prepare Ingredients: In a large mixing bowl, combine the drained green beans, cream of mushroom soup, and milk.

3. Season the Mixture: Add soy sauce, black pepper, garlic powder, and onion powder to the mixing bowl. Stir until everything is well combined.

4. Add Cheese: If you want a cheesy flavor, mix in shredded cheddar cheese at this point.

5. Transfer to Baking Dish: Pour the mixture into a greased 1.5-quart baking dish, spreading it evenly.

6. Top with Fried Onions: Sprinkle the French fried onions generously over the top of the casserole.

7. Bake: Place the baking dish in the preheated oven and bake for 25-30 minutes, or until bubbly and golden brown.

8. Serve Hot: Remove from the oven and let it sit for a few minutes before serving. This will help it set.

These simple steps will guide you through creating a Southern Green Bean Casserole that bursts with flavor and comfort.