By RICHARD N. OSTLING AP Religion Writer October 4, 2002, 12:27 PM EDT The star is an asparagus. His buddies include a tomato and a cucumber. And they're featured in a movie based on the biblical tale of Jonah, the guy who got swallowed by a whale. What's the big idea? At Big Idea Productions, it's that kids' entertainment can teach children a thing or two about morality and religious faith yet still trigger a belly laugh or two. The independent studio from suburban Chicago is about to find out if mainstream moviegoing audiences agree. Its first feature-length film, "Jonah...