Add frozen vegetable mix and diced potatoes to a large rimmed sheet pan. Drizzle with olive oil and season with salt and pepper. Toss to coat and spread into an even layer.
Bake the vegetables for 20 minutes, or just until they are starting to brown on the edges.
Meanwhile, in a small bowl, combine the honey, Dijon, apple cider vinegar, and garlic powder.
To the sheetpan with the baked vegetables, add the smoked sausage and drizzle the honey-Dijon sauce over the top. Toss to coat and then spread into an even layer.
Bake for 10 to 15 minutes more, until the sausage is heated through and the sauce is caramelized
Notes
For easy cleanup, line your baking sheet with parchment paper.