1
In a large, heavy bottom saucepan, combine lentils, water, quatered onion, bay leaf.
2
Bring to a boil.  Do not cover.  Simmer by reducing heat to medium or medium-low for 30-40 minutes, or until lentils are tender.
3
Drain remaining water.  Remove and discard cooked onion and bay leaf. 
4
Combine vegetable broth, vinegar, salt, pepper and garlic.  Mix well.
5
Add to broth mixture: lentils, thawed edamame, chopped green onion, dillweed and mint.
6
Serve warm or slightly chilled.