For the Filing
250 grams ground beef, sirloin
1 stalk celery, chopped
½ piece onions, chopped
1 piece egg
cheddar cheese, grated
1 piece big tomato, sliced
1 piece big white onion, sliced and caramelized in Marsala wine
1 piece small pickle
1 piece cheddar cheese, sliced
1 piece zucchini, sliced and grilled
Japanese mayonnaise and mustard
Marinate overnight ground beef with chopped celery, onions, whole egg and grated cheese. Add salt and pepper to taste.
Heat oil in a grill pan over medium heat. Cook burger until well done.
Assemble vegetables and burger. Make it stable by sticking toothpick at the center.