Use a heatproof bowl that fits snugly over a saucepan without touching the water
Fill the saucepan with 1 to 2 inches of water
Bring the water to a gentle simmer, not a boil
Place the bowl on top of the saucepan
Add the ingredients to the bowl
Stir as needed while the steam gently heats the bowl
Keep the bottom of the bowl above the water level
Remove the bowl carefully using oven mitts or a towel
Use a metal, glass, or ceramic bowl only
Avoid letting water splash into the bowl