Melt-in-the mouth meat and vegetables in a sealed casserole: Stage 2

Peel and rinse 200 g Brussels sprouts, then cut into 4 lengthways.

Only use the white part of the leek and chop finely.

Peel 100 g onion and chop finely.

Dice 150 g belly (streaky) bacon small (use smoked if possible).