DIRECTIONS
1
Wash the potatoes thoroughly. Keep the skin on and quarter the potatoes lengthwise.
2
Add purple (or tri-color) potatoes to a large saucepan; cover with cold (salted) water. Bring to boil over high. Cover, reduce heat to medium-low, and cook until potatoes are just tender, about 8 minutes.
3
Meanwhile, grill the jalapeno.
4
Next, in a large bowl, stir together mayonnaise, mustard, yogurt, lemon juice, black pepper and salt.
5
Drain potatoes and add immediately to the mayonnaise mixture; stir gently to combine. Chill.
6
Stir in the scallions and jalapeño (with or without seeds), and serve.
7
(NOTE: If making in advance, stir in additional fresh lemon juice just before serving.)