Line the bottom of the cauldron (or heavy-bottomed pot) with the diced lamb fat (tail fat). Layer thick onion rings over the fat.
Place the meat chunks on top of the onion. Season the meat generously with salt, black pepper, and cumin. Add the bay leaves.
Layer the coarsely chopped carrots.
Then layer the peppers and tomatoes. Lightly salt these layers.
Place the potatoes (whole or halved) on top.
Firmly cover the top of all the vegetables with large cabbage leaves or coarsely chopped cabbage. The cabbage acts as a lid and retains moisture.
Add 100-150 ml of water (only to the bottom, to prevent scorching at the start).
Cover with a very tight lid. If the lid is not tight, you can seal it with dough (a traditional method).
Bring the Dimlama to a strong heat until you hear it bubbling, then reduce to the lowest heat and simmer for 1 hour 45 minutes without opening.
Remove the cabbage 'lid'. Carefully scoop the meat and vegetables onto a large bowl in reverse order (first potatoes, then the rest of the vegetables, and the meat on top).
Drizzle with the aromatic broth created at the bottom of the pot. Serve sprinkled with fresh herbs.