Bring a large pot of salted water to a boil.
While the water heats, prepare the vegetables. Peel and slice the cucumber, dice the bell peppers, thinly slice the red onion, and halve the tomatoes. 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 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, cucumber, tomatoes, bell peppers, and red onion.
Pour the dressing over the pasta mixture and toss gently until evenly coated.
Add the feta cheese and fresh dill. Toss lightly to distribute throughout the salad.
Let the High Protein Greek Pasta Salad rest for 15–20 minutes so the flavors can blend.
Refrigerate until ready to serve.
Before serving, stir gently and adjust seasoning if needed.