01 -
Set the oven to 175°C and allow it to preheat.
02 -
In a large skillet over medium heat, brown the ground beef until thoroughly cooked. Drain any excess fat.
03 -
Add chopped onion and sliced mushrooms to the skillet with the beef and sauté for 5 minutes, until the onion is translucent and mushrooms are tender.
04 -
Stir in cream of mushroom soup, milk, garlic powder, Worcestershire sauce, salt, and pepper. Mix until evenly incorporated.
05 -
Fold in the drained green beans, ensuring they are well coated in the sauce.
06 -
Transfer the mixture to a greased 33×23 cm baking dish, spreading it evenly.
07 -
Sprinkle the shredded cheddar cheese over the casserole, then evenly scatter crispy fried onions on top.
08 -
Place the dish in the preheated oven and bake for 25–30 minutes, until bubbling and the top is golden brown.