Miss USA Erin Brady -- Gets Fishy After Winning Crown

After winning the Miss USA crown Erin Brady did what any starving beauty queen would do -- EAT ... well, kinda.

Our beauty queen spies tell TMZ ... Erin keeps her body right and tight by eating healthy (like all the time) ... which is why the 25-year-old noshed on a beet salad and spicy tuna on crispy rice as her first post-pageant meal.

Gorging on a burger didn't even cross Erin's mind ... she's a sweet over salty person. But the one thing she is craving: a hot fudge sundae, with ALL the toppings ... but for now, that's just unrequited love.