Arnold & Maria Reunite for Dinner ... and a Show

9/28/2011 8:55 AM PDT BY TMZ STAFF

Arnold Schwarzenegger and Maria Shriver broke bread last night -- their second meal together in less than a week -- but this dinner date was about more than just a meal.

Arnold and Maria went to Mastro's Steakhouse in Bev Hills with their kids ... Patrick, Christina, and Chris ... to celebrate Chris' 14th birthday.

Every celeb in town knows Mastro's is a paparazzi hotbed -- so, it sure seems like the Schwarzeneggers wanted to put on a show for the cameras.

The message: We can all get along ... for good steak, at least.