Vegan Cauliflower Mac and Cheese

Name: Vegan Cauliflower Mac and Cheese
Ingredients: 3 cups small cauliflower florets, chopped; 2 teaspoons extra-virgin olive oil; 1 large shallot, minced; 1 large clove garlic, minced; Juice of 1 small lemon (about 2 tablespoons); 1 tablespoon white or yellow miso paste; 2 teaspoons spicy mustard; Kosher salt and freshly ground black pepper; 1/2 teaspoon ground cayenne pepper; 1/8 teaspoon ground turmeric; 3/4 cup plain unsweetened almond or other plant-based milk; 1/4 cup nutritional yeast flakes; 2 teaspoons packed brown sugar; 10 ounces shredded vegan Cheddar (about 2 1/2 cups); 1 pound elbow macaroni; Hot sauce, for serving, optional