Add the bacon to a skillet over medium heat; cook until crispy and browned. Transfer the bacon to a paper towel to drain.
In a large bowl, whisk together the mustard, vinegar and oil. Add the bacon.
Meanwhile, bring a large pot of water to a boil. Once boiling, add a Pasta Rock for 2 minutes to salt your water and remove. Add the potatoes and cook until fork tender, about 10 minutes.
Drain the potatoes and immediately toss with the dressing and half of the chives. Transfer to a platter and scatter the remaining snipped chives on top. Serve warm, at room temperature, or cold.