Don't cook meatballs until you see this Italian secret recipe

Today I have prepared for you a very rich recipe that you probably haven't tried yet. A simple recipe that everyone will love. Children particularly like tender chicken breast with it. They are very tasty and juicy. Try it and you'll want to do it every week! They are so delicious that I make them every week and want them every day!

1 onion
Cook over medium heat until tender
1lb/ 450g ground beef
1/2tbsp salt
Black pepper
1 egg
Mix it well and form meatballs
5oz/ 150g sour cream
1/2tsp salt
Black pepper
1/2tbsp sugar
1/2 turmeric
1tbsp mustard
Bake at 395F/ 400C for 30 minutes
2oz/ 50g cheese
Bake for another 10 minutes

Garnish:
5 potatoes
1tbsp