Rinse green lentils under cold water and pick out any broken pieces—this prevents sandy texture and improves how they absorb dressing. I use a fine-mesh strainer because I learned the hard way that loose lentils disappear down regular colanders.
Bring a large pot of salted water to a rolling boil, then add lentils and reduce to a simmer for 25-30 minutes until they're tender but still hold their shape. Test one by biting it; if it's mealy instead of firm, they're done—overcooked lentils turn into mush and disappear into the dressing, which I discovered during my second attempt at this recipe.
While lentils cook, whisk together olive oil and fresh lemon juice in a small bowl and set aside. I always do this step first because it gives the flavors time to marry together, and the acidity softens by the time the warm lentils are ready to absorb it.
Drain lentils and immediately transfer to a large mixing bowl while they're still steaming hot. Pour the lemon dressing over warm lentils right away—this is the secret that most recipes skip, and it's why your summer lentil salad family tastes restaurant-level instead of cafeteria-flat.
Stir the warm lentils with dressing and let them cool to room temperature, about 15 minutes, while the flavors settle into each piece. Connor watches this part because he swears the salad tastes better when it cools down intentionally instead of rushing it.
Fold in diced cucumber, halved cherry tomatoes, diced red bell pepper, and finely chopped red onion once lentils have cooled. If you add vegetables to hot lentils, they soften too quickly and lose their crunch—I learned this by watching them turn into mush more times than I'd like to admit.
Gently toss in cooked chickpeas, smoked turkey strips, crumbled feta, chopped fresh parsley, and mint leaves until everything is distributed evenly throughout the easy lentil salad. Taste and adjust lemon juice or salt if needed—sometimes the mint flavors change depending on the season, so trust your palate instead of the recipe alone.
Refrigerate for at least 30 minutes before serving, though it tastes even better after sitting overnight because all flavors deepen and blend together seamlessly.