Spicy Tuna Sushi Roll

Name: Spicy Tuna Sushi Roll
Prep time: 40 min
Cook time: 20 min
Total time: 1 h
Cuisine: Japanese
Ingredients: 2 cups uncooked glutinous white rice; 2.5 cups water; 1 tablespoon rice vinegar; 1 (5 ounce) can solid white tuna in water, drained; 1 tablespoon mayonnaise; 1 teaspoon chili powder; 1 teaspoon wasabi paste; 4 sheets nori (dry seaweed); 0.5 cucumber, finely diced; 1 carrot, finely diced; 1 avocado - peeled, pitted and diced