How to Make It
Whisk together vinegar, oregano, mustard, lemon zest and juice, garlic, and black pepper in a large bowl. Add olive oil in a slow, steady stream, whisking constantly, until smooth.
Add cooked pasta, cherry tomatoes, basil, feta, sun-dried tomatoes, olives, and capers, and toss gently to combine. Serve at room temperature or chilled.