1 cup water
3/4 cup flour
3/4 cup vegetable oil
1/2 cup sugar
2 teaspoons salt
1/2 teaspoon dry mustard
1 Tablespoon lemon juice
1/4 teaspoon paprika
1/4 teaspoon garlic salt (optional)
Process 1 cup water, 3/4 cup flour in blender just until smooth. Pour into saucepan. 1/2 cup white vinegar
Add this to flour/water mixture in saucepan. Cook just until thickened, stirring constantly.
Combine in blender container and process until smooth. Add to hot mixture, and continue to blend until smooth again.