material

2 bananas, 1 orange, 0.5 lemon, 3 to 5 tablespoons sugar.

Exercise:

1. Take two bananas as meat, one orange as juice, half a lemon as juice, and three to five tablespoons of sugar. Put all the materials together in an acid-resistant enamel pot and bring to a boil over high to medium heat.

2. Remove floating foam. Stir constantly with a spoon, and turn off the heat when it is cooked over medium heat until it becomes sticky.

3. The enzyme will be more concentrated after cooling. It doesn't need to be boiled too dry, and the enzyme is made in less than 20 minutes.