Tofu Kebabs with Cilantro Sauce

Name: Tofu Kebabs with Cilantro Sauce
Ingredients: 2 cups fresh cilantro leaves; 1/4 cup plus 1 tablespoon vegetable oil, plus more for grates; 1/2 jalapeno chile, seeded; 1 teaspoon grated fresh ginger; 2 tablespoons fresh lime juice; 3 scallions, white and green parts separated and cut into 1-inch lengths; Coarse salt and ground pepper; 1 package (14 ounces) extra-firm tofu, weighted and cut into 12 pieces; 2 summer squash, halved and cut into 1-inch pieces