Avocado Salad

This is my first shot at replicating the avocado salad I had at a French household.

This sounds similar:
http://www.acozykitchen.com/avocado-salad-with-honey-mustard-dressing/
At least in terms of dressing... so...

I made a good dressing of:

• 1/4 cup extra virgin olive oil, cold-pressed
• almost 2 tablespoons lemon dijon mustard
• 1 TBS champagne vinegar
• 1/2 tsp apple cider vinegar
• 1 1/2 tsps. fresh parsley

I like the way the dressing turned out, but my avocados are overripe and mushy. I threw them in the fridge to chill will the dressing, but it's a futile attempt. I have a feeling I'll be mashing them and making avocado mustard dip.