Ready to create a masterpiece? Follow these steps:

1. Preheat your oven to 350°F (175°C). This sets the stage for a perfectly baked casserole.
2. In a large skillet, cook the ground beef over medium heat until browned, about 6-8 minutes. Use a wooden spoon to break it into crumbles as it cooks.
3. Add the chopped onion and minced garlic to the skillet. Sauté until the onion is translucent and fragrant, approximately 3-4 minutes.
4. Stir in the cream of mushroom soup, milk, and soy sauce. Let it simmer for 2-3 minutes, allowing the flavors to meld together.
5. Meanwhile, blanch the fresh green beans in boiling water for about 3 minutes, then drain and set aside.
6. In a large mixing bowl, combine the ground beef mixture and green beans. Season with salt and pepper to taste.
7. Transfer the mixture to a 9×13-inch baking dish. Sprinkle the shredded cheddar cheese evenly over the top.
8. Bake in the preheated oven for 20 minutes. The cheese should be melted and bubbly.
9. Remove from the oven and sprinkle with French-fried onions. Return to the oven and bake for an additional 5 minutes until the onions are golden brown.
10. Let it cool for a few minutes before serving. This allows the flavors to settle and makes it easier to serve.

As you follow these steps, remember my abuela’s advice: trust your senses. The aroma wafting from your oven will be your guide!