Steps
1. In a small bowl, mix the drained tuna with gochujang and sesame oil until well combined.
2. Lay the seaweed sheet flat on a bamboo mat or clean surface.
3. Spread the sushi rice evenly over the seaweed, leaving a 1cm border at the top.
4. Arrange the spicy tuna mixture, cucumber, and carrot in a line near the bottom edge of the rice.
5. Carefully roll the seaweed tightly into a cylinder, using the mat to help.
6. Slice the roll into 1.5 cm bite-sized pieces.
7. Sprinkle toasted sesame seeds on top.
8. Serve with soy sauce for dipping if desired.