This thick Tuscan soup is called ribollita, Italian for re boiled, because it’s traditionally made with leftover beans, vegetables, and stale bread. But this version starts fresh with soaked cannellini beans, delicate savoy cabbage, and sturdy lacinato kale, ribs and all—the Instant Pot makes them all meltingly tender in no time.
This thick Tuscan soup is called ribollita, Italian for re boiled, because it’s traditionally made with leftover beans, vegetables, and stale bread. But this version starts fresh with soaked cannellini beans, delicate savoy cabbage, and sturdy lacinato kale, ribs and all—the Instant Pot makes them all meltingly tender in no time.
Adding the rustic bread cubes directly into the entire cooking pot before storage creates a gluey, disintegrated mass by day two. Starch molecules from the bread swell uncontrollably when subjected to prolonged moisture, turning a robust broth into paste. Isolating the liquid base from the carbohydrate component remains mandatory for maintaining structural integrity across meal prep cycles. Pressure cooking the cannellini beans and lacinato kale for 15 minutes yields a completely tender foundation that holds up brilliantly in the refrigerator for up to four days.
Portion the bean and vegetable mixture into airtight containers while omitting the bread entirely until the final reheating phase on the stovetop. When thermal energy hits the cold broth, stir in fresh one-inch bread chunks and warm the mixture gently over medium-low heat for roughly five minutes until the liquid reduces and coats the rustic crumb properly. Removing the parmesan rind before storage prevents rubbery protein lumps from forming during the chilling process.
Swapping the pancetta for extra virgin olive oil accommodates vegetarian diets without sacrificing the savory depth traditionally provided by rendered cured pork fat.