Complex sentence: He has collaborated with his wife, British-Indian director Gurinder Chadha, on a number of films and made his directorial debut in 2005 with "The Mistress of Spices", based on the novel by Chitra Banerjee Divakaruni.
Split into simpler sentences: He has collaborated with his wife, British-Indian director Gurinder Chadha, on a number of films. He made his directorial debut in 2005 with "The Mistress of Spices", based upon the novel by Chitra Banerjee Divakaruni.