
Place the olive oil, red wine vinegar, sugar, garlic, salt and Dijon mustard in a jar with a tight-fitting lid, then shake it well until blended. Refrigerate the dressing until serving.
Make the salad In a large bowl, combine the romaine, bacon, tomatoes and onion. Toss the avocados with lemon juice and add them to the salad. Sprinkle with cheese. Before serving, add the dressing, shaking the jar to blend again if needed.