Add the potatoes to a large pot of water and cook over medium heat until tender, about 20 minutes.
In the meantime add the sausage to a large frying pan over medium-high heat and break up using the GoodCook meat chopper and cook until no pink is visible. Set the sausage to the side.
Add the onions and celery to the pan and cook over medium heat for 5 to 6 minutes, do not caramelize.
Stir in the sage, thyme and cooked sausage until combined. Set aside.
Drain the potatoes and add to a large bowl with butter and mash until smooth with some chunks.
Fold in the cooked sausage and vegetables, breadcrumbs, flour and eggs until combined.
Scoop individual portions into 2 muffin trays. Drizzle on optional melted butter and bake at 400° for 20 to 25 minutes.