Onion chutney or pyaaz ki chutney is a traditional chutney made with onion as the main ingredient. Other ingredients usually include ginger, red chili peppers, green chili peppers, cumin, turmeric, mustard seeds, oil, salt, and various spices.
There are many onion chutney variations made with different additional ingredients. The ingredients are ground into a paste and mixed with oil, and the chutney is then usually served as a spread or a dip, but it's also used in curries and sandwiches or with cheese and roasted vegetables.