The time it takes to cook frozen prawns depends on the size of the prawns and their personal taste. Generally speaking, if it is cooked in a big fire, it can be cooked in about 5 minutes after the water boils. If the shrimp is small and easy to cook, the cooking time can be appropriately reduced; If the shrimp is large, the cooking time can be appropriately increased.

The following are the steps for cooking frozen prawns:

1. Take the shrimp out of the freezer and thaw it at room temperature. If time is short, you can also thaw it in the microwave oven.

2. Clean the shrimps and remove their whiskers.

3. Add water to the pot, add appropriate amount of pepper, and boil over high fire.

4. Add the thawed shrimp, boil and cook for 5 minutes.

5. Take out the cooked shrimp and drain it for later use.

6. Prepare seasoning juice, mix a proper amount of soy sauce, balsamic vinegar and sesame oil and stir well.

7. Dish the cooked shrimp and serve with seasoning juice.

The above steps are for your reference and can be adjusted according to your personal taste and preference.