Red Wine Vinaigrette

2/3 cup red wine vinegar
1 1/2 cups sugar
1/4 cup red onions, finely grated (about 1/4 of a large red onion)
2 tablespoons Dijon mustard
2 teaspoons salt
ground pepper to taste
2 cups canola oil

Add all ingredients except oil in a blender. Blend well. While processing, slowly add the canola oil and blend well. Transfer dressing to a jar or cruet. It keeps well in the refrigerator for 1-2 weeks (although I’ve found it gets a little thick if it is too cold so I’ll pop it in the microwave for 5-10 seconds to help thin it out before I use it if it has been in the refrigerator for several days).

http://www.melskitchencafe.com/2010/05/gourmet-green-salad.html