Preheat your oven to 350℉.
Rub your potatoes in olive oil. Place on a baking sheet lined with parchment. Roast the potatoes for around 15 minutes in the oven, until they are soft but not cooked all the way through.
In a medium mixing bowl, prepare your meat by combining breadcrumbs, egg, sour cream, minced garlic, and herbs. Form meatballs roughly the size of the baby potatoes.
When the potatoes are done roasting, do not turn off the oven. Remove the potatoes from the oven and cool. Slice the potatoes in half but not all the way through so they are still in tact.
In a baking dish, alternate the potatoes and meatballs.
Mix together the boiling water, sour cream, and tomato paste.
Pour the mixture over the potatoes and meatballs in the baking dish.
Then bake in the oven for 25-30 minutes until the meatballs are cooked through.