Combine salt, allspice, black pepper, oregano, mint, and cinnamon in a small bowl and set aside. Heat olive oil in a high-sided skillet over medium heat. Add the lamb and cook, breaking the meat apart with a wooden spoon until it’s almost cooked through, 3–4 minutes. Add the spice mixture, tomatoes, chickpeas, stock, and harissa to taste. Cook until the mixture is warmed through, about 10 minutes. Reduce heat to low to keep warm while you make the hummus.