Bake the potatoes [poke holes in them with a fork first] at 350 for 30- 45 minutes or until soft.
In a frying pan with a tiny bit of olive oil, cook chopped onions and garlic. Add tomato chopped and whatever other veggies you like. When the potatoes are done, cut them in half and scoop out most of the insides, put them in a bowl. Mash them up and add them to the other veggies and mix it all together. You can add sea salt, pepper and whatever spices of you choice. I also added a bit of avocado.