Rinse the rice and cook it in 280 ml (1 cup plus 2 tbsp) of water: bring to a boil over high heat, cover, simmer on low for 15 minutes and rest 5 minutes. Stir in the rice vinegar.
Preheat the oven to 200°C (400°F) with a rack in the centre. Line a small tray with parchment.
Mix the tamari and maple syrup and brush it over the salmon.
Roast for about 12 minutes, until the salmon flakes easily and reaches 63°C (145°F) in the thickest part.
Dice the cucumber and grate the carrot. Mix the lactose-free yogurt with a pinch of chili flakes.
Fill the bowls with rice, salmon, cucumber and carrot and top with the spicy yogurt, sesame seeds and green onion tops.
Tips
Most sriracha contains garlic; use a little cayenne in the yogurt instead.