Lentil salad with sausage and carrot

Ingredients

• 2 cups dried green lentils
• 13 steps 6 cups water
• 1 bay leaf
• 1 sausage
• slice thinly
• 1 tablespoon olive oil
• cook over moderately low heat, stirring occasionally, until just softened
• 1 onion
• chop finely
• 4 carrots
• cut into 5mm slices
• 2 stalks celery
• cut into 3mm slices
• 1 tablespoon garlic
• chopped finely
• 1 1/2 teaspoons dried thyme
• 1/4 cup red wine vinegar
• blend
• 1/2 cup olive oil
• 1 tablespoon Dijon mustard
• salt and pepper