In a medium bowl, whisk together the yogurt, balsamic vinegar, garlic, agave nectar, salt and pepper.
While whisking the dressing constantly, slowly pour in the olive oil until the mixture is combined.
The Salad:
Cook pasta according to package instructions. Drain and rinse with cold water.
In a large bowl, mix together the pasta, tomatoes, romaine lettuce, cannellini beans and capers.
Pour in two-thirds of the dressing and mix well with the pasta salad. Taste and add more dressing, if desired.
Gently stir in basil. Add additional salt and pepper, if desired. Serve.
Notes
Please note that I am not a medical or nutritional professional. I provide nutritional information for my recipes as a courtesy to my readers. It is calculated using the built-in recipe card calculator. While I attempt to provide information that is as accurate as possible, you should calculate the nutritional information independently before relying on it.