Clams with garlic and black bean sauce

1. Scrub clams clean
2. Boil until they open, when they open, fish them out of the pot
3. Rise black beans, Mix black beans and crushed garlic, heat pan, stir fry until fragrant. 
4. Put opened clams into stir fry and continue to stir fry.  When mixed, add soy, sugar, cornstarch slurry.  
5. When thick, plate