Dice 1 onion rosemaryand the dhania into very small pieces. Mince garlic

Add it to the mince, add rosemary, minced garlic, salt and pepper and mix but don't overdo it

Make 8 golfball sizes, flatten and put on a tray. Cover with foil and place in fridge

Cut the 2 remaining onions into long straight pieces and steam for 15 minutes

Next, using cast iron pan, fry the onions with butter/cooking oil for 20 minutes on medium low heat. Reduce heat if they start to burn

Cut the onion and cucumber into thin round shapes

Mix the Ketchup, mayo and mustard and set aside

To fry the burgers, heat the pan till smoke comes out, add oil then fry one side. Once you flip the burger, top with cheese, cover and let it cook till the cheese melts

Repeat process for all the burgers

Now toast the burger buns on both sides then apply the Ketchup, mayo mustard mixture on the buns

Layer the ingredients starting with the cucumber, tomato, burger and top woth caramelized onions