1) Preheat the oven to 400ºF. Line a baking sheet with parchment paper
2) Cut the sweet potatoes in half length wise. Brush 2 tsp of the olive oil on the parchment paper and place the sweet potatoes cut side down.
3) Bake for 40 minutes or until sweet potatoes are soft.
4) While the sweet potatoes are baking, heat the remaining 1 tablespoon of olive oil.
5) Add the rest of the ingredients except for the 2 tbsp of pistachios.
6) Cook on medium heat for 5 to 7 minutes.
7) Once the potatoes are cooked let them cool until they are cool enough to handle.
8) Place sweet potatoes on a serving dish cut side up, top each sweet potato half with the chickpea mixture.
9) Squeeze the juice of half a lime on the chickpeas.
10) Mix the juice of the remaining half lime with the yogurt and drizzle on the chickpeas.
11) Sprinkle the remaining 2 tablespoons of pistachios on the stuffed potatoes.