1.
Prepare spaghetti according to the package directions. Drain and rinse well with cold water.
2.
Transfer spaghetti to a big salad bowl; add cut tomatoes, cut cucumbers, peppers, oregano, and olives.
3.
Pour olive oil and vinegar over the salad; toss well to combine. Top with crumbled feta cheese.
4.
Chill for 2 to 4 hours. Serve.