Heat oil in large pot over medium heat. Add onion and bell pepper and cook until onion is translucent. Add garlic, jalapeƱo, and meat and cook 5 minutes.
Add tomato paste, spices, and tomatoes until liquid reduces (about 15 minutes). Add corn and black beans and 4 tbsps of cilantro and spread in a 9X13 Pyrex.
Mix 1/2 cup of milk and 2 tbsps of butter with pureed sweet potatoes and spread over meat mixture.
Bake on 400F for 20-30 minutes until brown. Garnish with remaining cilantro.