Out of all the methods that we tried, roasting is the best way to go for serving up a large number of wienies as it’s fairly easy and worry-free. Preheat the oven to 350°F (177°C). Place the hot dogs on a rimmed baking sheet lined with parchment paper. Roast for
10 to 20 minutes, or until hot dogs are heated through to 160°F (71°C). Hot dogs can be placed in a prewarmed slow cooker to keep warm, or just temperature lowered.