1. Place the sliced kielbasa into your slow cooker.

2. In a bowl, mix together the chopped apples, brown sugar, Dijon mustard, apple cider vinegar, cinnamon, and nutmeg.

3. Pour the apple mixture over the kielbasa in the slow cooker.

4. Add the chopped onion on top of the apple and kielbasa mixture.

5. Cover and cook on low for 4-6 hours, stirring occasionally, until the apples are tender and the kielbasa is glazed.

6. Serve warm, garnished with a sprinkle of fresh parsley if desired.

For those who enjoy a bit of extra spice, adding a pinch of red pepper flakes or some smoked paprika to the recipe can give these bites a delightful kick. If dealing with picky eaters, you might want to reduce the mustard and vinegar slightly to soften the flavors. And for an even fruitier twist, try adding a handful of dried cranberries or raisins in the last hour of cooking.