Susan's Spinach and Pine Nut salad

1 large pkg. fresh spinach
1 piece bacon for each person you are serving
2 cups swiss cheese, shredded
2 tomatoes, cut up
1 pkg feta cheese
pine nuts, toasted

Cook bacon crisp and crumble. Toss all together with dressing immediately before serving

DRESSING:
1/2 cup olive oil
1/2 cup vinegar
1/2 cup sugar

Mix well until dissolved.