Boil a large pot of salted water, and cook pasta according to package. Drain and rinse noodles under cold water to stop them cooking. Set aside.
Dice the cucumber and tomatoes, slice the peppers into fine bite-sized ribbons, chop the spinach, and all all veggies to a bowl. Add the pasta and dressing - toss to coat. Squeeze the lemon juice over the salad and toss once more. Add a pinch of oregano, and season with Salt and Pepper if needed! Crumble cheddar on top and voila!
For leftovers - I like to take a quart sized mason jar, fill half with pasta salad, and half with fresh spinach and enjoy for a quick and easy lunch!