In a small bowl or jar, whisk together vinegars and sugar until sugar has dissolved. Add olive oil honey, shallot, and sesame seeds - whisk until well blended.
In a large bowl, toss spinach, almonds, blackberries, goat cheese and dressing. Serve immediately.
Storage: Store dressing separately from salad in an airtight container or jar.
Recipe adapted from Cooking Classy.