From melaniecooks.com
1 12-ounce piece summer sausage
1/2 cup apricot jam*
3 tablespoons Dijon mustard
2 tablespoons brown sugar
Preheat the oven to 325°F. Line a baking sheet with parchment paper; set aside.
In a medium mixing bowl combine apricot jam, mustard, and brown sugar; mix well.
Slice the summer sausage three quarters of the way through (accordion style) into 1/8 to ¼-inch slices, so the slices are connected at the bottom. Place the summer sausage onto the baking sheet, and brush with half of the glaze. Be sure to get glaze in between the slices by using a spoon to do so. Reserve the remaining glaze.
Put the summer sausage into the oven and bake for 25 minutes. After 25 minutes, remove from oven and brush with remaining glaze. At this point, the spaces between the slices should have opened up making it easier to get glaze between each. Return to the oven and bake for an additional 20 minutes. Remove from oven and serve as you see fit. It can be reheated in the microwave, if needed.