Heat a skillet over medium low heat. Add the onion and half of the butter. Cook until soft and browning.

Meanwhile, cook the sausage and cauliflower according to the directions on the package.

When cauliflower is done, transfer to a bowl and add the remaining butter. Mash it using a stick mixer, back of a fork, or a potato masher. Salt and pepper to taste.

When all elements are done, plate and serve.