Cut the washed and cleaned strawberries into wedges and marinate with crushed green pepper and powdered sugar. Leave the butter in a pan, toss the spring onions briefly in it, lift out with a slotted spoon and set aside. Add the liver to the pan and brown on all sides over medium heat. Salt and pepper, deglaze with port wine and remove the liver. Reduce the sauce by half, pour through a sieve into a saucepan. Add balsamic vinegar and 4 tablespoons of water. Arrange the liver with the spring onions, balsamic sauce and strawberries decoratively on plates.