Black Rice Salad with Cilantro Pesto

Name: Black Rice Salad with Cilantro Pesto
Ingredients: 1 cup Brazil nuts; 1 small kabocha squash, peeled, seeded, cut into ½-inch pieces; 1½ cups olive oil; 3 tablespoons unseasoned rice vinegar; 2 teaspoons freshly grated lime zest; 1 tablespoon fresh lime juice; Kosher salt, freshly ground pepper; 1 garlic clove, chopped; 1½ cups cilantro leaves with tender stems, divided; 6 radishes, very thinly sliced; 3 scallions, thinly sliced; 1 shallot, very thinly sliced; 3 cups cooked black rice (from about 1½ uncooked)