Blackberry Vinegarette

Ingredients:
1 1/2 pints fresh blackberries
1/2 small red onion, roughly chopped
3 tbsp white balsamic vinegar
1 tbsp balsamic vinegar
1/3-1/2 cup extra virgin olive oil
1 tbsp honey
3 tbsp verjus (or try using juice from 1/2 a lemon instead)
zest of 1/2 a lemon
1 tsp Dijon mustard
kosher salt to taste
fresh cracked pepper to taste

Directions:
In the bowl of a food processor, process the blackberries until puréed.
Remove and strain out the left over solids and seeds through a fine mesh sieve.
Return to food processor with the chopped onions and purée until completely liquefied.
Mix in remaining ingredients, tasting as you go.