1In small bowl, cover tomatoes with boiling water. Let stand 30 minutes; drain. Chop tomatoes. In small bowl, mix all remaining spread ingredients; stir in tomatoes. Cover and refrigerate 1 hour.
2Cut focaccia horizontally in half. Spread tomato spread over cut sides of focaccia. Layer roast beef, cheese and tomato slices on bottom half; top with onion rings and basil. Add top half of focaccia. Cut into 6 wedges.