Fill a pot with water and 2 teaspoons salt. Bring to a boil. Meanwhile, slice the potatoes into ¼-inch thick rounds.
Place the cooled potato slices in a bowl and toss with 1 cup of plain yogurt until evenly coated. In a separate bowl, whisk breading mix, paprika, and cayenne pepper.
Heat vegetable oil in a frying pan to 375°F. Fry the slices in small batches for about 2-3 minutes on each side until golden brown. Drain on paper towels and serve warm with preferred dipping sauce.