Mediterranian Macaroni Salad

1/3 C. olive oil
1/4 C. fresh lemon juice
1 tsp. salt, divided
1/2 tsp. pepper, divided
2 C. elbow macaroni, cooked according to package direction & cooled
3 scallions (white & green parts), finely chopped
1 C. halved cherry or grape tomatoes
4oz smoked mozzarella, cut into 1/4 in. cubes
1 tsp. fresh or dried oregano

For dressing, combine oil, loemon juice, and half the salt and pepper in a small bowl; whisk well and set aside.
In a large serving bowl, combine remaining ingredients, including remaining salt and pepper.
Toss salad with dressing. Can be served chilled or at room temperature.