For the rolls, stir yeast and 20 g sugar until liquid. Put butter and milk in a pot and warm it up. Add 125 ml water and let it cool down lukewarm. Put 1 tsp. salt, flour and 1 egg in a bowl.
Add the milk mixture. Add the yeast mixture and immediately knead into an elastic dough with the dough hooks of the hand mixer for 6-8 minutes. Cover and leave to rise in a warm place for about 45 minutes.
Peel and finely dice the shallots. Peel garlic and chop finely. Halve, clean, wash and cut the peppers into very small cubes. Chop the peppers finely. Heat olive oil in a pot.
Sauté the shallots, garlic, peppers and paprika for about 3 minutes. Add 1 tablespoon of sugar and let it caramelize slightly. Deglaze with whiskey. Add tomato paste and strained tomatoes and simmer covered for about 30 minutes.
Soak bread in cold water. Knead minced meat, mustard, squeezed bread and 2 eggs and season with salt, pepper and paprika powder. Form 8-10 flat patties of the mixture into roll size. Heat oil in a pan.
Fry the meatballs for 5-6 minutes in portions while turning. Remove and keep warm.
Briefly knead the yeast dough again on a floured work surface. Form 8-10 round rolls from the dough and spread them on two baking trays lined with baking paper. Brush the rolls with water and sprinkle with oat flakes, then cover and let them rise for another 20 minutes.
Bake the rolls one by one in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: see manufacturer) for approx. 15 minutes. Remove and let cool on a cake rack.
Wash and clean the tomatoes and cut them into thin slices. Wash, clean and shake the lettuce dry. Cut open the rolls, cover them one after the other with lettuce, tomato, meatball and cheese, add whiskey-salsa and cover the rolls.