French Onion Dressing (Taco Salad)

From: Aunt Ree

Blend together in blender:
1/2 c. catsup
1/2 c. vinegar
1 c. oil
1/2 c. sugar
3 Tbsp onion, diced
1/2 tsp salt
1/2 tsp dry mustard
1 tsp paprika
1 1/2 tsp chili powder