1Heat soup as directed on can. Meanwhile, heat panini maker to 350°F (medium-high).
2Place cheese slices on 1 slice of the bread; top with remaining slice of bread. Spread butter on top of sandwich. Place on panini maker. Close cover; cook 3 to 4 minutes or until bread is toasted and cheese is melted. Remove sandwich to plate or cutting board; cut into 12 small squares.
3Ladle hot soup into 2 bowls or cups. Sprinkle with basil. Serve immediately with grilled cheese dunkers.