Sauté aromatics: Heat olive oil in a pot and add onions, leeks, carrots, and garlic. Cook until softened and lightly golden.
Add pancetta: Stir in diced pancetta and cook until the fat renders and flavors the vegetables.
Simmer the stew: Add soaked chickpeas, barley, and broth. Bring to a gentle boil, then reduce to low heat. Simmer uncovered for 45–60 minutes, stirring occasionally.
Season: Add salt and herbs toward the end. The stew should be thick, rustic, and earthy.
Serve: Spoon into bowls with a drizzle of olive oil, rustic sourdough, olives, and a wedge of cheese.