Cook pasta as directed on package. Drain; place in large serving bowl.
Meanwhile, heat oil in large skillet over medium-high heat until hot. Add scallops, tomatoes and garlic; sprinkle with salt and pepper. Cook about 2 minutes or just until surface of scallops turns opaque, stirring occasionally.
Stir in cream and oregano. Bring just to a boil. Add to hot pasta in bowl; toss gently to mix. Sprinkle with cheese. If desired, garnish each serving with sprig of fresh oregano.