Heat oven to 400 F.

Cut the sausages in quarters lengthwise, then in half crosswise.

Cut the puff pastry into strips 2 ½ inches long and 1 ½ inches wide.

Roll the sausage pieces in the pastry strips and transfer to a parchment-lined baking sheet.

Bake until puffed and golden brown, 20-25 minutes. Serve with the mustard for dipping.