Preheat Oven: Preheat your oven to 350°F (175°C).
Prepare Potatoes: Boil the potatoes until tender, then cut them into bite-sized pieces.
Cook Sausage and Green Beans: Boil the smoked sausage slices for a few minutes, drain, and do the same for the green beans.
Assemble Casserole: In a large baking dish, mix the potatoes, sausage, and green beans. Season with garlic and herb seasoning. Sprinkle bacon bits evenly over the top.
Add Butter and Cheese: Place butter pieces evenly on the mixture. Sprinkle shredded cheese over the top.
Bake: Bake in the oven for 10 minutes or until the cheese is melted and bubbly.
Serve: Serve warm and enjoy!