1. Preheat oven to 450°F. Place 1/4 c. drained RO*TEL® tomatoes in small bowl; set aside. Mix remaining RO*TEL® tomatoes and ROSARITA® beans in small bowl until combined. Spread evenly onto pita breads.
2. Sprinkle pizzas evenly with cheese. Place on ungreased baking sheets; bake 8 to 10 min. or until edges of breads are lightly browned and cheese melts, rotating pans halfway through.
3. Top with lettuce, onion and reserved RO*TEL® tomatoes.