Peel, wash and quarter the potatoes. Cook in plenty of boiling salted water for about 20 minutes. In the meantime grate cheese. Pluck basil leaves. Wash and clean the tomatoes and carve them crosswise.
Wash the meat and dab dry. Cut into pieces of about 3 cm. Stick them tightly on skewers. Drain potatoes. Add milk and mash. Whisk eggs and cream and stir into the puree.
Fold in cheese, basil and pine nuts. Put 3 paper sleeves into each other and fill in the puree. Press 1 tomato lightly into the puree. Cook in the preheated oven (electric cooker: 225 °C/ convection oven: 200 °C/ gas: level 4) for 12-15 minutes.
Fry skewers in hot oil for 8-10 minutes. Season with salt and pepper. For the last 3 minutes stir tomato paste into the cooking fat. Turn the skewers in it. Serve muffins and skewers garnished with basil.