- Stir water, lentils and salt in small saucepan. Cover and bring to a boil. Remove lid, dropheat to simmer and cook for 35-40 minutes, until water is absorbed and lentils are al dente. Remove from heat. 
- Heat oven to 400°F. Crumble mushrooms into large roasting tray. 
- Roughly chop parsley, garlic and walnuts. Scatter over mushrooms. 
- Pour oil over vegetables add salt and pepper, stir to combine. 
- Roast vegetables for 15 minutes, until mushrooms are withered and walnuts are toasted. 
- Remove vegetables from oven, stir into finished lentils. Add balsamic vinegar and flaxseed.