Preheat oven (electric cooker: 220 °C/circulating air: 200 °C/gas: see manufacturer). Brush baking tray with oil. Peel and finely dice onion. Place the mince and onion in a bowl and knead into a smooth mixture with your hands.
Season with salt and paprika powder. Shape the meat mixture into 4 minced steaks, press slightly flat. Place the steaks in a row on the baking tray and bake in a hot oven for about 15 minutes.
Grate the cheese for the cheese sauce. Peel garlic, dice finely. Melt butter in a pot. Sauté the garlic for about 1 minute. Dust with flour and sauté for about 1 minute while stirring. Add milk first, then beer while stirring.
Bring everything to the boil, simmer for about 5 minutes while stirring. Add cheese and melt while stirring. Season with salt and nutmeg.
Drain the beans and corn in a sieve. Clean and peel the carrots and cut them into long thin strips with a peeler. Spread carrots, beans, corn and half of the sauce on the hot steaks.
Sprinkle with chips. Bake the minced steaks for another 10 minutes. Remove. Arrange steaks with remaining cheese sauce.