Bring the water to a boil in a large saucepan. Add the bouillon cubes, and stir until they have dissolved. Then add the carrots and additional water to cover. Bring to a boil again, reduce the heat, and cover. Simmer for 25 minutes. Drain the carrots, reserving the cooking liquid.
Melt the butter in a large saucepan. Add the onion and squash, and cook over medi