Panch Puran, Bengali five spice or Panch Phoron.

Panch puran simply put is five different spices used whole to flavours curries and pickles. Equal quantities of nigella seeds, mustard seeds, cumin seeds, fennel seeds and fenugreek seeds are mixed together. The ready blend can also be shop bought. Using this in stir fried vegetables and a variety of curries including dal and fish curries is fairly common in the east of India. Fry the spices in hot oil, as they crackle and pop to release the flavour to the oil and add warmth to the dish