In large bowl, stir together flour and salt. Cut in butter with pastry blender or fingertips until mixture resembles coarse meal. Whisk egg with 2 tbsp (30 mL) water; stir into flour mixture, adding a bit more water if necessary, until dough comes together.
Form dough into ball; flatten into disk. Wrap in plastic wrap and refrigerate for 45 minutes.
Heat oil in large skillet set over medium heat; cook sweet potato, onion, garlic and jalapeño until slightly softened. Stir in chickpeas, lentils, cumin, chili powder, oregano, salt and pepper; cook for 3 to 5 minutes or until well coated and fragrant. Stir in kale; cook for 1 minute. Stir in tomato paste; cook for 1 minute.
Stir in broth and lime juice; cook for 5 to 8 minutes or until sweet potatoes are tender and most of the liquid has evaporated. Let cool completely. Mash lightly with fork. Stir in Parmesan; fold in chopped eggs.
Preheat oven to 425˚F (220°C). Beat egg with 1 tbsp water; set aside. On lightly floured surface, roll out dough into 1/8-inch (3 mm) thickness. Using 5-inch (12 cm) round cutter, cut dough into 16 rounds, rerolling scraps as needed.
Brush edges of each round with some of the egg wash. Spoon 2 tbsp (30 mL) filling onto each round, leaving border at edges. Fold dough over to enclose filling and seal edges with fork. Place on parchment paper–lined baking sheet; brush tops of empanadas with remaining egg wash.
Using fork, prick tops to create steam vents. Bake for 18 to 20 minutes or until empanadas are golden brown. Let cool slightly.
Stir together parsley, cilantro, garlic, olive oil, jalapeño, lime juice, red wine vinegar, salt, pepper and oregano. Serve with empanadas.