Preheat oven to 375 F. Prick each sweet potato several times with fork, place on baking sheet, and bake for 40 minutes, or until centers of potatoes are easily pierced with the tip of a knife.
As potatoes cook, in medium saucepan, heat oil over medium. Add onion, carrot, and 1/4 tsp salt; heat until beginning to soften, about 5 minutes. Add celery and garlic; heat for 3 minutes. Stir in Italian seasoning, cumin, chili flakes, and black pepper; heat for 30 seconds. Place wine in pan and simmer for 3 minutes, scraping up any brown bits from bottom of pan. Stir in marinara sauce and simmer for 15 minutes. Stir in lentils and balsamic vinegar; simmer for 5 minutes.
In small bowl, stir together hempseeds, nutritional yeast, garlic powder, onion powder, and remaining 1/4 tsp salt.
Slice open potatoes along their length and top with Lentil Bolognese. Sprinkle on Hemp Parm mixture and garnish with parsley.