Identify a popular item that combines rice and beans at Porto's.

The choice of Arroz con frijoles is a popular item at Porto's that specifically combines rice and beans, which is a traditional and beloved dish in many Latin cultures. This dish highlights the essential role these two ingredients play in providing a hearty, nutritious meal that also holds cultural significance. Rice and beans together create a complete protein, making it a favored staple among various communities for its simplicity and satisfying nature.

Arroz con pollo, while another classic dish, primarily features rice with chicken rather than focusing on the combination of rice and beans. Paella is a Spanish dish made with rice and a variety of other ingredients, often including seafood, but it does not emphasize the rice and bean combination. Tabbouleh is a Middle Eastern salad made primarily with bulgur wheat, parsley, and tomatoes, and does not include beans or rice in its traditional preparation. Thus, Arroz con frijoles stands out as the item that directly meets the criteria of combining rice and beans at Porto's.