Visit your local farmers market and purchase the following ingredients for this delicious summer salad. Varieties of fruit balsamic can be found at most local supermarkets or specialty food stores. 
Blackberry Vinaigrette Salad
By The Gourmet Farm Girl
For the Dressing
1/2 cup extra virgin olive oil
1/2 cup vegetable or canola oil
1/4 cup Blackberry Balsamic vinegar (or regular balsamic)
2 Tablespoons honey or brown sugar (more if desired)
Or a sugar substitute such as Splenda 
Pinch of sea salt and cracked black pepper
Assortment of fresh greens
1 small zucchini (sliced or chopped)
1 small red onion (sliced)
1 8 oz. package blue cheese
Feta or Goat cheese works well in this recipe also
1 small package fresh blackberries
Whisk the dressing ingredients together in a small bowl and set aside.
Assemble the number of plates needed with the fresh greens; whisk the dressing again and drizzle over the salad. Top with the  zucchini, red onion slices, blue cheese crumbles and a few fresh blackberries.
Store leftover dressing in a pint jar in the refrigerator for up to two weeks. Warm to room temperature and whisk again or shake before serving.