Spinach Salad

1 head lettuce
10 oz. package spinach
½ c. sliced mushrooms
½ lb. swiss cheese
1 red onion
½ lb. cottage cheese (whole carton)
10 pieces cooked bacon, crumbled

Dressing:
1 ½ T. poppy seeds
¾ c. oil
½ c. sugar
¾ c. white vinegar
1 ½ tsp. minced onion
1 tsp. salt

Mix well.