San Idli's crispy dosa arrives as a thin, golden crepe with a shatteringly crisp exterior and a tender interior, filled with spiced potato masala. The kitchen makes everything fresh daily, including the dosa batter and accompanying chutneys, which gives the dish a lightness that sets it apart from heavier versions. The dosa holds its crunch even when dipped into sambar or chutney, and the portion is generous enough to share. The restaurant has built its reputation on this signature preparation, drawing regulars who appreciate the balance between texture and flavor.