The steps to cook delicious and nutritious shrimp porridge are as follows:

1. Clean the shrimp first and separate the heads and meat. Heat oil in a pan and sauté onion and ginger.

2. Pour in the shrimp heads and stir-fry until they change color. Add appropriate amount of water and bring to boil. Pour in the rice that has been soaked in advance and bring to a boil, then reduce to low heat and simmer until soft.

3. Cut mushrooms, carrots and green beans. After 10 minutes, add the mushrooms, green beans, and carrots and cook for another 5 minutes. Finally add the shrimp meat, salt and pepper, stir well and cook for about a minute.