1. Cook beans in boiling water 3 minutes; remove with a slotted spoon. Rinse under cold water; drain. Place beans in a large bowl. Cook pasta according to package directions, omitting salt and fat. Drain and rinse under cold water; drain. Add pasta to beans.
2. Drain tuna through a sieve over a bowl, reserving oil. Flake tuna with a fork. Add tuna and next 4 ingredients (through capers) to bowl; toss. Combine reserved oil, olive oil, and remaining ingredients in a blender; process until smooth. Pour oil mixture over pasta mixture; toss to coat.