Rinse the rice until the water runs clear. Put in a small saucepan with 250ml (1 cup) water, cover and bring to the boil. Reduce the heat to low and cook for 12 mins or until tender and the water is absorbed. Turn off the heat and stand, covered, for at least 5 mins.
Step 2 — Prep ingredients
Meanwhile, chop the tomato. Halve the cucumber lengthwise, scrape out the seeds using a teaspoon, then thinly slice. Thinly slice the spring onions. Pick the coriander leaves, then finely chop the stems. Juice half the lemon*.
Step 3 — Prep chicken
Melt 20g butter in a separate small saucepan over medium heat. Remove from the heat, stir in the curry paste and season with salt and pepper. Transfer the curry paste mixture to a large bowl. Lightly score the smooth side of the chicken, add to the curry paste mixture and turn to coat.
Step 4 — Chargrill chicken
Heat a chargrill pan over high heat until hot. Reduce the heat to medium-high and cook the chicken, turning regularly, for 8-10 mins until cooked through.
Step 5 — Make kachumber
(See cooking tip.) Combine 1 tbs lemon juice and ½ tsp sugar in a large bowl and season with salt and pepper. Add the tomato, cucumber, spring onion and coriander and toss to combine.
Step 6 — Get ready to serve
Fluff the rice with a fork. Divide the rice and chicken among plates. Serve with the kachumber.