Cook the lentils: Combine rinsed lentils and vegetable broth in a saucepan. Bring to a boil, then reduce heat, cover, and simmer for 20-25 minutes, or until tender. Drain any excess liquid and set aside.
Prepare the vegetables: Preheat your oven to 400 degrees Fahrenheit. On a large baking sheet, toss the chopped root vegetables, red onion, and broccoli with 1 tablespoon of olive oil, thyme, salt, and pepper. Spread them in a single layer.
Roast the vegetables: Roast for 25-30 minutes, stirring halfway through, until the vegetables are tender and slightly caramelized.
Make the dressing: In a small bowl, whisk together the apple cider vinegar, Dijon mustard, and maple syrup. Slowly whisk in the 1/4 cup of olive oil until the dressing emulsifies.
Assemble the salad: In a large bowl, combine the cooked lentils and the roasted vegetables. Pour the dressing over the mixture and toss gently to coat everything evenly.
Finish and serve: Stir in the fresh parsley. Serve warm or chill for later use as a plant-based protein meal prep option.
Notes
For a heartier grain bowl, add 1 cup of cooked quinoa or farro to the final mixture.
This salad keeps well in the refrigerator for up to four days, making it excellent for weekly meal prep.
If you prefer a tangier dressing, increase the apple cider vinegar by one teaspoon.