What is the fastest way to lose weight besides exercise?

A powerful diet to lose 20 kilograms a month (I personally tried to lose weight 15 to 20 kilograms, as long as it is strictly in accordance with the requirements). Breakfast is 2 tomatoes+a glass of milk (a small cup), lunch is a bowl of rice (a small bowl)+two cucumbers (preferably cold), and dinner is a bowl of porridge+a small amount of pickles (if you are used to midnight snack, you can eat less watermelon instead). Don't cook too much food for 30 days.