01 - Combine lentils, water, and bay leaf in a saucepan. Bring to a boil, reduce heat, and simmer uncovered for 20–25 minutes until lentils are tender but not mushy. Drain, discard bay leaf, and sprinkle with ½ teaspoon salt. Let cool to room temperature.
02 - While the lentils cook, dice avocado, halve cherry tomatoes, dice cucumber, and finely chop red onion, parsley, and mint.
03 - In a small bowl, whisk together olive oil, lemon juice, lemon zest, mustard, yogurt, garlic, salt, and pepper until creamy and emulsified.
04 - In a large mixing bowl, combine cooled lentils, tomatoes, cucumber, red onion, parsley, and mint. Pour over the dressing and toss gently to coat.
05 - Gently fold in the diced avocado, taking care not to mash it.
06 - Divide the salad among bowls. Top with toasted pumpkin seeds and serve with lemon wedges.