Put the onions in a nonstick skillet and place on stovetop on high heat. As soon as the onions start to brown or stick to the skillet, add a 1 or 2 tablespoons of water. Then, add garlic and ginger and stir for 30 seconds over medium heat. Add all the dry spices and stir for another 30 seconds. Add a splash of water whenever the ingredients stick to the pan. Add corn, peas and cubed Russet potatoes and let cook for 5 minutes, stirring occasionally. Add the cilantro and lemon juice. Remove from heat. Stuff the skins with this filling and serve.