Okinawan Taco Rice Bowls

Name: Okinawan Taco Rice Bowls
Ingredients: For the taco bowls; 2 cups short-grain sushi rice or arborio rice; 2 cups shredded cheese (cheddar or a mild white cheese like Gruyère, asiago, or mozzarella); 2 cups shredded iceberg or romaine lettuce; 1 pound ground beef; 2 tablespoons olive oil; 1/2 teaspoon chili flakes; 1 teaspoon ground cumin; 1/2 teaspoon ground coriander; 1 teaspoon sweet paprika; 1 clove garlic, minced; 2 tablespoons soy sauce; 2 teaspoons sweet miso paste, dissolved in 1/2 cup water; For the salsa; 3/4 cup diced fresh tomatoes; 2 tablespoons rice vinegar; 1 tablespoon mirin; 1 tablespoon soy sauce; 2 teaspoons minced fresh ginger; 1 small red chili, minced (optional, only if you like heat!)