Add olive oil to a medium pot on medium high heat. Stir in onion, garlic & shallot mix and cook for 2-3 minutes. Add potato and brown for another minute, then add pumpkin soup, chicken broth, cumin, salt, pepper and 1 sage leaf. Bring to a boil, then reduce heat and simmer until potatoes are tender, stirring occasionally. Remove sage leaf and add cheese and kale and cook another 5 minutes.
To prepare the pumpkin serving bowls: Bring a large pot of water to a boil. Meanwhile, cut a large circle around each pumpkin’s stem, remove the top and hollow out the seeds. Gently add the pumpkins and stems to the boiling water with a slotted spoon and blanch for 1-2 minutes. Do not overcook the pumpkins. This will sterilize the inside of the pumpkin and will help keep the soup warm. Carefully remove the pumpkins and stems from the pot and drain the excess water.
Ladle each serving of stew into a pumpkin, garnish with extra cheese and sage, then serve immediately. Do not store leftover stew in pumpkins.