Winter Squash and Savoy Cabbage Gratin with Garlic Crema

Name: Winter Squash and Savoy Cabbage Gratin with Garlic Crema
Ingredients: 10 garlic cloves; 3/4 cup extra virgin olive oil, plus more for greasing; 1/4 cup hazelnuts; One 2-pound butternut squash—peeled, halved lengthwise, seeded and cut into 1/2-inch-thick slices; One 1-pound Delicata squash—halved lengthwise, seeded and cut into 1/2-inch-thick slices; Kosher salt; Pepper; 1 pound Savoy cabbage, cored and cut into 2-inch pieces (about 16 cups); 2 cups low-fat milk; 2 tablespoons cornstarch whisked with 1/4 cup water; 4 ounces mild white cheddar or Fontina, shredded; 3 tablespoons chopped parsley; 1 1/2 tablespoons chopped fresh sage