In a blender or food processor (or by hand with whisk), blend the following until smooth and creamy: 1 cup olive oil, 1/3 cup red wine vinegar, 1 tsp Dijon mustard, 1 clove minced garlic, 1/4 tsp sugar, 1/4 tsp basil, 1/4 tsp thyme, 1/8 tsp marjoram, 1 tbsp grated Parmesan cheese, 1/4 tsp horseradish, 1 tbsp minced parsley, salt and pepper.