'1/4 cup of finely chopped onion'
'2 tablespoons of soy sauce (shoyu)'
'400 grams of ground beef'
'200 grams of mozzarella cheese'
'4 hamburger buns with sesame seeds'
'2 slices of bread form'
'1 egg'
'Salt to taste'
'Tomato sauce'
'2 tablespoons of olive oil'
'1 tablespoon of parsley'
'1 can of 400g tomato puree'
'Salt to taste'
'Acessories'
'2 refractory containers'
'Biscuit cutter with a 9cm diameter'
'1/4 cup of finely chopped onion'
'2 tablespoons of soy sauce (shoyu)'
'400 grams of ground beef'
'200 grams of mozzarella cheese'
'4 hamburger buns with sesame seeds'
'2 slices of bread form'
'1 egg'
'Salt to taste'
'Tomato sauce'
'2 tablespoons of olive oil'
'1 tablespoon of parsley'
'1 can of 400g tomato puree'
'Salt to taste'
'Acessories'
'2 refractory containers'
'Biscuit cutter with a 9cm diameter'
'Chop the bread form and mix well with the beef, egg, salt, and onion.'
'Lubricate a smooth surface with oil.'
'Put a quarter of the mixture inside and press it.'
'Repeat the operation with the remaining portions.'
'Spread soy sauce on refractory container'
'Arrange the hamburger patties and flip them to moisten both sides.'
'Cook them in the microwave at high power for 5 minutes.'
'Reserve'
'In another refractory container, place the tomato and its liquid, olive oil, and salt.'
'Mix and heat it in the microwave for 5 minutes.'
'Add parsley'
'Put a quarter of the sauce on half of the bread and, on top, place the hamburger patty.'
'Fold one-quarter of the mozzarella cheese slices in half and place them over the beef.'
'Repeat the operation with the remaining portions and heat it in the microwave for 1 minute.'
'Cover with the remaining bread and serve with lettuce.'
