Lean Philly Cheesesteaks

INGREDIENTS

• 1 tablespoon olive oil
• 1 1/2 cups thinly sliced onion
• 1 cup sliced red bell pepper
• 1 cup sliced green bell pepper
• 5 garlic cloves, minced
• 2 teaspoons sugar
• 1 teaspoon dried oregano
• 2 teaspoons white wine vinegar
• 1/4 teaspoon salt
• 4 ounces light processed cheese, cubed (such as Velveeta Light)
• 3 tablespoons less-sodium beef broth
• 12 ounces thinly sliced, low-sodium deli roast beef, shredded
• 4 hot dog buns, toasted