What I would have made if I hadn't had to work...

The recipe below is a fancy version, courtesy of famous Nigella Lawson.
However, if I am in the hurry, I cut it down to the few basic spices (cumin), chopped onion and garlic, ginger, chopped red pepper, a can of chickpeas, a sweet potato and skip coconut milk altogether in favor of 1/2 cup of water. It is still absolutely delicious.

Sweet Potato and Chickpea Curry

2 medium red onions, peeled
1 clove garlic, peeled
1 bird’s eye pepper, Thai chili or other very hot small pepper with its seeds
1 2 ½ to 3 inch piece of ginger, peeled and cut into chunks
3 tbsp oil
½ tsp hot red pepper flakes
½ tsp ground ginger
1 tsp ground coriander
1 tsp ground cumin
1 ½ tsp ground turmeric
3 cardamom pods, lightly crushed (or 1 tsp ground cardamom)
Salt to taste
2 pounds (about 3 medium) sweet potatoes, peeled and cut into ½ to 1 inch cubes
1 ¾ cups coconut milk
1 tbsp tamarind paste
2 ¼ cups vegetable broth
4 to 5 cups (about 4 cans) cooked chickpeas
2 tbsp chopped cilantro leaves

1. In a food processor, combine onions, garlic hot pepper and ginger. Pulse until finely chopped. Place oil in a large sauté pan over medium-low heat. Add chopped onion mixture and sauté until softened, about 5 minutes.
2. Add hot pepper flakes, and spices. Stir to mix. Add sweet potatoes and stir until well covered in spices. Stir in coconut milk.
3. Dissolve tamarind paste in hot broth and add to pan. Bring to boil, then reduce heat and simmer, partially covered, until sweet potatoes are just tender, about 25 minutes
4. Add chickpeas and simmer until heated through, about 5 minutes. Adjust salt to taste. Transfer to a bowl and sprinkle with chopped cilantro.