Chillies are naturally low in calories and contain capsaicin, the compound responsible for their heat, along with vitamin C and antioxidants. Whole dried red chillies bring warmth and depth to curries, dals, and stir-fries without overpowering other spices. Add them whole to hot oil at the start of cooking to infuse the dish, or crumble for extra heat. Store in a sealed container away from moisture.