X17 XCLUSIVE - Sandra Bullock Celebrates With A Burger (From Her Own Burger Joint)!

Just as she promised!

Sandra Bullock took home the Best Actress Oscar for The Blind Side last night as expected - heck, she's been working out at the gym nonstop the past few weeks! And she did look lovely in her dress...

But after the win, she told reporters backstage that all she really wants is a burger! "I want to eat and not worry the dress will bust open," she said. And Sandy kept her promise!

Decked out in a sexy pants suit and heels, Sandra Bullock and her hubby Jesse James dined at one of Long Beach's finest eateries for lunch today -- they're very own Cisco Burger!

Jesse started the place in April, 2006; the joint bills itself as an "old-school hamburger stand with a modern, eco-friendly philosophy."

You know you love it! A photog on the scene tells us this:

"Sandra and Jesse looked so cute together - they're totally in love. And she was kind of dressed up. She expected to see me there getting the burger shot since she announced it at the Oscars!"

Unfortch, we didn't snap a shot of her biting into the burger. Why? "Jesse wasn't having it," reveals our photog. "He growled at me like a dog - I guess he really does 'have her back!'"

A call to the restaurant turned up nothing -- they're not telling what the boss or his wife chowed down on today, but they did confirm ... it was burgers! :)

Congrats on the win, Sandy! And take a break from the gym this week, mmkay?