Combine 1 cup water, rice, 1/4 teaspoon salt, and broth in a large saucepan; bring to a boil. Cover, reduce heat, and simmer 15 minutes or until liquid is absorbed. Coat a large baking sheet with cooking spray. Spread rice in an even layer over pan; cool to room temperature.
Bring 1 cup water to a boil in a large pan. Add beans; cover and cook 5 minutes, or until crisp-tender. Drain and plunge beans into ice water; drain.
Combine vinegar, oil, and 1/2 teaspoon salt in a large bowl, stirring with a whisk. Add rice, beans, tomatoes, green onions, cheese, and pepper; toss gently to combine. Cover and chill.