They have a Carrabba's in the metro area. It's a chain restaurant, but I like Carrabba's.
The most famous Indianapolis restaurant I know of is St Elmo's in the downtown area, close to Monument Circle. But it's a steakhouse, not Italian.
If you want to take in Indy 500 memorabilia, The Union Jack Pub on the far west side has plenty of it, and serves good pizza besides.