Step 1

Pop a stick of butter into a casserole dish (about 28 x 33 cm).

Step 2

Preheat the oven to 175°C (350°F) while the dish sits in there, letting the butter melt.

Step 3

Carefully take the dish out of the oven after the butter's melted. Toss in the rice, onion soup, beef consommé, and mushrooms right over the melted butter.

Step 4

Mix everything gently with a fork or spoon so the rice spreads evenly in the liquid.

Step 5

Put the dish back in the oven and bake for 30-40 minutes, checking for a golden, beautifully browned top.