Spinach salad

Spinach Salad
2 Bunches fresh spinach
1 Small purple onion
3/4 lb Fresh mushrooms
3/4 lb. Swiss cheese
1 Cup Cottage cheese
1/2 lb bacon - crisp and crumbled -- toss all ingredients together

Dressing
3/4 T. Poppy seeds
1/3 Cup white vinegar
1/2 Cup oil
1/3 Cup sugar
3/4 T. Grated onion
3/4 Tsp. salt
1/3 Tsp. mustard