Peel both types of potatoes and cut into cubes of about 2 cm. Wash and clean the peppers and cut them into cubes as well. Peel, halve and finely chop the onions. Peel garlic and also chop finely.
Heat the oil in a large pot, fry the minced meat for about 4 minutes at high heat until crumbly, add the onions and garlic and fry for about 1 minute. Add the potatoes and peppers. Stir in tomato paste and pour in tomatoes and stock, season well with salt, pepper and paprika. Cover and simmer for about 40 minutes.
Wash the chives, shake dry and cut into fine rolls. Remove the pot from the stove. Spread the chives and nachos over it and serve.