Prepare all vegetables and herbs, and crumble the feta.
Set aside the finely diced onion
Prepare the pasta per package instructions
While the pasta is cooking, make the dressing. Mix the lemon juice, vinegar, salt, and pepper.
Add the onion to the lemon juice/vinegar mixture and allow to sit for a few minutes.
While whisking the vinegar/onion mixture, gradually add the olive oil to emulsify.
Once the pasta is cooked, drain and rinse with cool water. Combine pasta, vegetables, herbs and cheese. Then add the dressing and gently fold to mix. Store in the fridge up to 5 days.