Mix the flour. Add butter in flakes. Dissolve 1/2 teaspoon salt in 150 ml lukewarm water. Add to the flour and knead everything into a smooth dough. Wrap in cling film and let rest for about 30 minutes.
In the meantime, wash and clean the green beans and cut them into pieces. Cook in boiling salted water for about 6 minutes. Drain, quench and let drain. Drain kidney beans and corn, rinse and drain.
Peel and finely dice the onion and garlic. Wash the chillies, dab dry, halve lengthwise, remove seeds and chop finely. Heat oil in a pan. Sauté onions, garlic and chilli. Add minced meat and fry for about 5 minutes.
Season with salt and pepper. Add beans, corn and salsa and fry briefly. Form 8-10 balls from the cornflour dough and roll out into thin, round flat cakes (approx. 20 cm Ø) on a floured work surface.
Bake in a pan without fat on both sides for about 1/2 minute. Wipe the pan with kitchen paper in between. Wrap the finished cornflakes in a damp cloth. Spread the chopping mass, up to 5 tablespoons, in the middle of the pancake and roll it up.
Place in a greased casserole dish and sprinkle with the remaining minced meat. Add the cheese and bake in a preheated oven (electric range: 225 °C/ convection oven 200 °C/ gas: level 4) for approx. 15 minutes.