Prepare the Lentils: Rinse the black lentils thoroughly to remove any dirt or debris. Add them to a pot with 3 cups of water and bring them to a boil. Once boiling, reduce the heat to low, cover the pot, and simmer for 20-25 minutes until the lentils are tender but not mushy. Drain any excess water and let the lentils cool down completely.
Prep the Veggies: While the lentils are cooking, dice your tomatoes, cucumber, and red onion. Chop the fresh parsley and dill, and mince the garlic cloves.
Combine Everything: In a large bowl, mix the cooled lentils with the diced vegetables, herbs, and garlic. Squeeze in the fresh lemon juice, season with salt and pepper, and give everything a good stir to combine. Taste and adjust the seasoning if necessary.
Serve & Enjoy: Serve your Lentil Tabbouleh Salad chilled or at room temperature. It's perfect as a side dish, a light lunch, or even as a topping for wraps or grain bowls.