Heat olive oil in a large, non-stick soup pot over medium heat. Add onions and garlic. Cook and stir until onions begin to soften, about 3 minutes. Add gingerroot, curry powder, and ground cumin. Mix well and cook for 30 more seconds.

Add broth, apples, pumpkin, carrots, salt, and pepper. Bring mixture to a boil. Reduce heat to low and simmer, covered, for 12 to 15 minutes, or until carrots are tender. Stir occasionally.

Working in two batches, transfer soup to a blender and puree until smooth. Soup will be very thick. Return pureed soup to pot and stir in evaporated milk. Serve hot.