What does the cryptic crossword clue "Execrable starter in kebabs and processed food from cans (5,5)" mean?

The definition is "Execrable starter in kebabs and processed". The wordplay uses a double definition. Double definition The answer is BAKEDBEANS.

Execrable starter in kebabs and processed food from cans (5,5)

Guardian Cryptic #27284 | 11 Across | 2017-08-24 flower