Assemble the salad
To the same large bowl with the salad dressing, add sliced cherry tomatoes, quartered cucumber slices, diced bell pepper, red onion, and olives. Mix the dressing thoroughly with the veggies. Let them marinate while the pasta is cooking. The tomatoes should release juices.
Add drained and rinsed pasta and crumbled feta cheese to the bowl with marinated veggies. Toss to combine. Season with salt and pepper. Add more lemon juice if desired.
