My mother used to make a great potato salad and she would sneak jalapenos into it sometimes. When I was a kid I didn't care for jalapenos but love them now. I changed only the amount of peppers to this recipe. 2 seems just right for my family but depending on your taste for "hot" you can add more or less.
Cook potatoes with 1 TBSP salt until tender; drain and cool slightly. Slice. Combine mayonnaise, vinegar, jalapeno peppers, salt and black pepper in large bowl. Stir in remaining ingredients and toss gently.