The mistress of spices - Chitra Banerjee Divakaruni

Tilo, an immigrant from India, runs a spice shop in Oakland, California. While she supplies the ingredients for curries and kormas, she also helps her customers to gain a more precious commodity: whatever they most desire. For Tilo is a Mistress of Spices, a priestess of the secret magical powers of spices.

Through those who visit and revisit her shop, she catches glimpses of the life of the local Indian expatriate community. To each, Tilo dispenses wisdom and the appropriate spice, for the restoration of sight, the cleansing of evil, the pain of rejection. But when a lonely American ventures into the store, a troubled Tilo cannot find the correct spice, for he arouses in her a forbidden desire - which if she follows will destroy her magical powers...