smashed feta sweet potato boats

Name: smashed feta sweet potato boats
Ingredients: 1 (15.5-ounce) can chickpeas, drained but not rinsed; 3 tablespoons extra-virgin olive oil, divided; 1 teaspoon kosher salt, divided; freshly-ground black pepper; 1/2 teaspoon each ground cumin, ground coriander, and sweet paprika; 2 medium sweet potatoes (10 to 12 ounces each); 1 lemon; 6 ounces feta cheese, crumbled; 2 tablespoons finely chopped parsley, plus more for serving; 1 tablespoon finely chopped fresh mint, plus more for serving; tahini, for serving; extra-virgin olive oil; 2 cloves garlic, thinly sliced; 1 large bunch lacinato kale, stems removed