Prepare the onion, garlic, spice, stock and opened tomato tin before the chicken comes out. Put the rice and its measured water beside the second pan too. This keeps the raw-poultry stage short and means nobody searches cupboards with contaminated hands.
Use a separate board for the chicken and do not wash it. An adult can cut even bite-sized pieces, transfer them directly to the pan, then wash hands with soap and clean the board, knife, tap and any touched surface. Only after that reset should children return to pouring and stirring.
During the 5-minute fry, turn the chicken so its outside loses the raw appearance and stir the spice through the oil. The onion may not be completely soft yet; it has another 15 minutes in the sauce. Lower the heat if garlic or curry powder begins catching on the base.
Add tomatoes and stock, then aim for a steady gentle bubble. Stir occasionally and watch the sauce move from watery red to one that coats each chicken piece. At the end, cut open a thick piece before serving; timing guides the cook, but the steaming, non-pink centre confirms readiness.
For the rice, rinse, combine with the measured water and stir only once after it boils. Put on the lid, use the lowest heat and avoid peeking because escaping steam changes the ratio. If the packet specifies another method, its instruction wins because rice types absorb differently.
Let the rice rest covered for 5 minutes, then fluff instead of pressing it. If curry and rice finish at slightly different times, keep the curry at the gentlest heat and leave rice covered. Serve promptly, cool child portions and deal with leftover rice straight after the meal.