I have worked long and hard on this and hope that this works as well for you as it does for me. You can of course adjust or leave out the salt and add a no salt seasoning.

This is about 8 servings,
2 Tablespoons per serving

Ingredients:

1 tablespoon lemon juice
2 tablespoon rice wine vinegar*
1 tablespoon Dijon mustard
2 garlic cloves
1 green onion chopped coarse
2 tablespoons Worcestershire sauce
1 /3 cup olive oil
1/ 4 cup water
1 teaspoon kosher salt
1 teaspoon black pepper

Optional:
1 teaspoon Xanathan Gum (to thicken)
4 anchovies, in the place of salt
croutons, about 1/ 2 cup per person. You could make some out of high fiber bread if you like.
*if you use another vinegar besides rice wine, reduce it by half.

Directions:

Blend all these together in a food processor or blender.

I really like the Magic Bullet, (at the top left of the picture)it is easy to clean and perfect for 2 to 4 people.

This is the color and texture of the dressing.

Traditionally the Caesar salad uses baby romaine leaves and not chopped romaine. You can of course use any greens.
The hard parmesan reggiano is really quite low in fat comparably
I always like to add some fresh grated pepper to this dressing.

Parmesan Reggiano Cheese the hard kind is about 40 calories for an ounce which is pictured above and about 3 grams of fat.

Arrange the romaine heart leaves in the bowl

When ready to serve toss the dressing with the salad.
I would use 2 tablespoons of dressing per serving.