Sweet and Spicy Calabaza Soup with Garlic Mojo

Name: Sweet and Spicy Calabaza Soup with Garlic Mojo
Ingredients: 2 tablespoons extra virgin olive oil; 3 cloves garlic, finely chopped; 1 anchovy, rinsed and finely chopped (optional); 1/2 bunch flat leaf parsley, leaves only, finely chopped; 1/4 small red onion, minced; Juice of 1/2 lemon; 1/2 teaspoon salt; 1/4 teaspoon freshly ground back pepper; 1 teaspoon ground Arbol chile; 1 calabaza, about 3 pounds, halved, or a 3pound piece of calabaza, seeded (see Note); 4 tablespoons unsalted butter; 2 large onions, diced; 1 ripe plantain, peeled and sliced 1/4inch thick; 1 tablespoon ground cumin; 2 teaspoons ground coriander; 1 teaspoon salt; 1/2 teaspoon freshly ground black pepper; 3 cups chicken stock, preferably homemade; 1 cup apple juice