Cauliflower and Kimchi Sandwiches

Name: Cauliflower and Kimchi Sandwiches
Prep time: 15 min
Total time: 15 min
Cuisine: American
Ingredients: 1 (24-ounce) head cauliflower, outer leaves discarded; Olive oil; Sea salt and freshly ground black pepper; 2 cups roasted cauliflower, coarsely chopped; 1/4 cup coarsely chopped store-bought or homemade kimchi and its juices; 1 tablespoon olive oil, plus additional for grilling sandwiches; Sea salt and freshly ground black pepper; 4 slices sturdy store-bought or homemade sandwich bread; About 2 tablespoons store-bought or homemade mayonnaise; 2 slices mild-flavored, good-melting cheese, such as provolone, Monterey Jack, or mild Cheddar