Preheat oven to 400° and spray a 9x13 baking dish with a non stick spray.
Wash creamer potatoes, cut in half and add to a sealable gallon size baggie.
Add oil, seasonings, pepper and red pepper flakes to baggie. Shake to coat.
In a large frying pan, add sausage and water and cook over medium high heat until sausages have browned and most of water has evaporated.
Remove sausage from pan and when cool enough add to baggie.
Melt butter in frying pan and add onions and garlic, cook until onions are translucent.
Let cool for a few minutes and then when cool enough, add to baggie and shake to mix.
Lastly, add green beans to baggie, shake to mix and then empty contents into prepared baking dish.
Cover with foil and place in the oven. Bake for 40 minutes or until potatoes are tender.
Carefully remove from oven and enjoy!