Bring a large pot of salted water to a boil.
While the water heats, prepare the vegetables. Slice the cucumber, halve the tomatoes, dice the bell peppers, thinly slice the red onion, and chop the fresh dill.
Cook the protein pasta according to package instructions until al dente, about 9–10 minutes.
Drain the pasta thoroughly and rinse under cold water until completely cooled.
In a small bowl or jar, whisk together the olive oil, red wine vinegar, lemon juice, oregano, garlic powder, salt, and pepper until well combined.
In a large mixing bowl, combine the cooled pasta with the cucumber, tomatoes, bell peppers, and red onion.
Pour the dressing over the mixture and toss gently until evenly coated.
Add the feta cheese and chopped dill, then toss lightly to distribute throughout the salad.
Allow the High Protein Greek Pasta Salad to rest for 15–20 minutes so the flavors can develop.
Refrigerate until ready to serve.
Stir gently before serving and adjust seasoning if desired.