To make your sausage green bean casserole, begin first by washing the potatoes, and cutting them into cubes. Then place the potatoes in your baking dish and toss them with olive oil.
Place the casserole dish into the oven and heat the oven to 425°F (218.3°C). Bake the potatoes for approximately 20 minutes.
When the potatoes are nearly done, remove the casserole dish from the oven. Slice the sausage and open the package of frozen green beans. Add both the sausage and green beans to the casserole dish. Drizzled with olive oil, then tossed the ingredients to combine. Season with salt, pepper, garlic salt as desired. Please back into the oven and bake for another 10 minutes or until the sausage and green beans are done.
Remove the casserole from the oven, and sprinkle with parsley. Then serve right away and enjoy!