1 3/4 pounds green beans, trimmed
3 tablespoons roasted walnut oil
1 tablespoon sherry vinegar
1 heaping teaspoon Dijon mustard
1 teaspoon kosher salt
1/2 teaspoon freshly ground black pepper
3/4 cup toasted walnuts, chopped
1/3 cup dried cranberries
1 small shallot, thinly sliced into half-moons
2 ounces crumbly blue cheese