Heat oil in a roaster or in a large pot that is suitable for both stove and oven; add onion, leek, celery, and carrot and fry on a medium heat for about five minutes
Add freekeh, rolled oat, and garlic and mix.
Add water, wine, soy sauce, date syrup, and spices, and stir. Taste and adjust seasoning if necessary.
Add the lasagna sheets and press them a little.
Add sweet potato and butternut squash and press in a little. Arrange the Merguez sausages on top, bring to a boil and cook on a medium-high flame for about ten minutes.
Meanwhile, preheat the oven to 140 degrees Celsius - 284 degrees Fahrenheit.
Bake for an hour and a half to two hours in the center of the oven. Check every twenty minutes, so the Hamin doesn't dry out. Add water if necessary - 1/4 - 1/2 cup at a time. We don't want the chowder to swim in liquid; Instead, when you tilt the pan slightly, you notice some liquid. After about forty minutes, turn the vegetables and sausages over with tongs, so they are evenly coated with the sauce.
The chowder is ready when it browns and the vegetables are soft.
Serve with pickled cucumbers and horseradish-beet salad.