Start by preheating the oven to 400F
Scrub the sweet potatoes well and place on a lined baking tray and bake for at least 1 hour until sweet potatoes are soft and can easily be pierced with a fork. This may take 1 hour 15 minutes depending on your oven
Dice the onions and saute in a skillet with the vegetable oil. Cook for 5 minutes until translucent
Add the ground beef and break it up using a wooden spoon. Cook for another 5 minutes
Add all the spices and continue cooking for a further 5-7 minutes until all the juices evaporate and the beef starts to caramelize. Remove from heat
Mix all of the sauce ingredients together in a bowl using a fork
Chop the lettuce and the radish (or any other vegetable you are using) into small pieces
When sweet potatoes are cooked, place on a plate and make one cut lengthwise to open the potato up. Leave the peel in tact and using your spoon push down the cooked potato to make space for the filling. Season it with salt and pepper
Spoon the ground beef filling on top of the potato, and top with the fresh vegetables. Add the sauce on top and enjoy