Why add a banana to cheesecakes? A delicious secret

You will need:
* potatoes - 4 pieces
* onion - 1 piece
* potato starch - 1 tablespoon
* egg - 1 piece
* salt, pepper - to taste
• Vegetable
* sour cream
For the sauce:
• Fat
• Bacon
* garlic - 3 cloves
* sour cream - 2 tablespoons