Add olive oil (or a splash of the broth) to a large pot with the onions and garlic. Cook over medium heat for 5 minutes or until the onions have softened.
Add thyme, salt, pepper and more broth. Cook for another minute.
Add carrots, butternut squash, and lentils. Stir to combine with onions, garlic and seasonings.
Add the remaining broth and bring to a gentle boil.
Cover with a lid and continue to cook for 20 minutes, stirring occasionally.
Remove the lid and continue to cook for an additional 10 to 15 minutes. Stir often until the stew has reached desired thickness.
Remove from heat and enjoy.