Line a baking sheet with parchment or foil.

Scrub sweet potatoes well, then poke several times with a fork.

Bake sweet potatoes on prepared pan in the center of oven 1 hour, or until tender. When the potatoes are done, set aside to cool.

In a large pot heat oil over medium heat.

Add onion and garlic, saute, stirring often, about 5 minutes, or until onions are translucent.

Add cumin, paprika, coriander, turmeric, pepper flakes, caraway, cinnamon, salt, and pepper. Cook, stirring continuously, until fragrant.

Add stock, chickpeas, and lemon juice and bring to a boil.

Slice the cooled potatoes in half lengthwise, scoop out the flesh, and add to the pot.

Using an immersion blender, puree the soup, blending until smooth, or carefully transfer to a blender to puree.

Serve hot.