Tear Romaine into bite-sized pieces and place in a large salad bowl with the red onions. Add 1 to 2 tablespoons of Classic French Dressing and lightly toss salad and then gently toss in avocados and tomatoes. Salt and pepper to taste. Add croutons and/or walnuts and serve.
Mix all ingredients, except the oil, in a blender or food processor. Slowly drizzle in oil through the top hole of the blender and continue blending until the mixture slightly thickens. Refrigerate for storage.
Replace avocado with walnuts and toss with Basic Vinaigrette Dressing.
Apple cider vinegar is milder and sweeter than most vinegars. Good cider vinegar is lightly cloudy, like fresh cider and has a fruity, apple flavor.