A crock pot french onion chicken soup with stovetop-caramelized onions, shredded chicken thighs, and noodles added late so they never turn to mush.
Do not skip the stovetop caramelizing step, this is what separates the recipe from a flat, steamed-onion soup. Meal-prepping? Freeze the base without noodles for up to 3 months, then simmer in fresh noodles when you reheat each portion. No sherry on hand, use dry white wine or a splash of apple cider vinegar plus a tablespoon of broth. Rotisserie chicken works in a pinch, shred it and stir it in during the last hour instead of cooking it from raw.