In a large pot of salted boiling water, place the lentils and cook until tender, about 20 minutes. Once cooked, drain the lentils and rinse in cold water to chill. Transfer to a large serving bowl.
While the lentils are cooking, whisk together the salad dressing ingredients until well combined.
Add the remaining salad ingredients on top of the lentils.
When ready to serve, pour the dressing over the salad and gently toss to combine.
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Notes
Storage: The undressed salad will keep well covered in the fridge for 3 days.