Start by pouring four cups of water in a medium or large pot, add the dried lentils and place it over medium-high heat.
Bring to a boil, then lower the heat and simmer for eighteen to twenty minutes, or until the green lentils soften --- drain and set aside.
For the dressing, heat the olive oil in a small saucepan.
Add the garlic and cook until it becomes fragrant.
Add the ground cumin and continue cooking for about two minutes.
Take the saucepan off the heat, add the lemon juice, and whisk to combine. Set aside for a few minutes to let it cool.
Combine the drained green lentils, fresh parsley, mint, and cooled lemon-garlic dressing using a large mixing bowl.
Mix evenly, then cover with a plastic sheet and chill for at least an hour in the refrigerator.
When ready to serve, chop the cucumber, tomatoes, and bell --- and add them to the bowl.
Toss, taste, and season with salt and ground black pepper.
Garnish your Lebanese lentil salad with more fresh herbs --- then enjoy!