Wash the meat, dab dry and cut into cubes. Clean and wash spring onions and cut into rings. Heat the oil in a pan and fry the meat well all around. Add spring onions and fry briefly.
Season with salt and pepper. Dust with flour, sweat and gradually add stock and cream. Boil up while stirring. Season again with salt and pepper. Keep warm. Peel, wash and thinly slice the potatoes.
Wash, clean and slice the tomatoes. Line a greased casserole dish with about 2/3 of the potato slices, sprinkle with salt. Spread the ragout on top. Cover the rim fan-shaped with the remaining potato slices and tomatoes.
Spread butter in flakes on top, sprinkle with almonds. Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for 40-45 minutes. If necessary, cover the casserole with aluminium foil 10-15 minutes before the end of the baking time.
Remove from the oven and garnish with basil.