It lasts well in the fridge for up to 2 weeks when I half the recipe, which is usually how long it takes my family to go through that much.
Homemade Poppy Seed Dressing
1 1/2 c. less refined (or raw) sugar
2 tsp. salt
2 tsp. dry mustard (scant)
2/3 c. red wine vinegar
3 T. onion juice (If you don't have onion juice--who does?--liquefy pieces of onion in blender. Or eliminate this altogether--which is what my children prefer.)
2 c. salad oil
3 T. poppy seeds
Mix together sugar, salt, mustard, and vinegar.
Add onion juice; blend.
Using blender (or immersion blender), blend salad oil slowly into mixture until thick. With a spoon, mix in poppy seeds.
Enjoy dribbled over your favorite salad!