Candied Kielbasa Bites

Preheat oven to $375^\circ\text{F}$ ($190^\circ\text{C}$). Line a baking sheet with heavy-duty foil or parchment paper to catch sticky runoff and simplify cleanup.

Place kielbasa links on a cutting board. Using a sharp knife, make thin, shallow cuts along the entire length of each link, slicing about halfway through the sausage.

In a bowl, combine 1 cup brown sugar, $\frac{1}{2}$ cup ketchup, and $\frac{1}{4}$ cup prepared horseradish. Stir until smooth and thick.

Place scored kielbasa links onto the prepared baking sheet. Generously spoon glaze over each link, pressing it down into the Hasselback cuts.

Bake at $375^\circ\text{F}$ ($190^\circ\text{C}$) for 35 to 45 minutes until glaze is thick and bubbly. Halfway through cooking, spoon melted glaze from the pan back over the top of the sausages.

Remove from oven and rest for 5 minutes. Slice into bite-sized pieces along the score marks. Transfer to a platter, garnish with fresh parsley, and insert toothpicks for easy serving.