Organize the recipe exactly before lighting the main burner. Drain and rinse the beans if using canned beans, then dry them lightly on paper towel so excess water does not dilute the aromatic base. Reserve 80 g / 2.8 oz of whole beans for the final garnish. Finely brunoise the onion so it melts into the sauce rather than reading as a separate texture. Slice the garlic thinly, pick and inspect the sage leaves, and measure the stock, wine, olive oil, breadcrumbs, salt, pepper, and lemon zest. Put a large pot of water on to boil for the pasta, but do not salt it yet. Set out a blender or immersion blender, a fine sieve, one sauté pan for finishing the pasta, one saucepan for the bean base, and warm shallow bowls for service.