Preheat the oven on 180 degrees Celsius or 356 degrees Fahrenheit.
Scrub the sweet potatoes clean. You don't have to peel them!
Place a fine strainer on top of a bowl. Then add the sauerkraut to the fine strainer and leave it to drain.
Cooking
Pack all the sweet potatoes in aluminium foil. The best is to pack each potato individually. Before closing each package, you can add a bit of salt, pepper & olive oil.
Bake the potatoes, depending on the sizes, for about 35-50 minutes.
In the meanwhile, you can slice the jalapeno's and toast some sunflower seeds.
Mashing
Scoop the cooked potato flesh out of the potato and add it to a bowl. Once you have all the potato pulp, you can add the butter, lemon juice, salt & pepper. Use a fork to slightly mash and mix the potatoes.
Add the drained sauerkraut to the sweet potato mash and mix carefully.
Serving
Serve the mash with arugula, goat cheese, jalapeno & toasted sunflower seeds.