Salmon and lentils are a familiar combo in French bistro cooking; here they combine in a quick and easy salad. For the best presentation, flake the salmon with a fork, then stir gently into the salad to keep it in chunks, not tiny bits.
Whisk lemon juice, dill, mustard, salt and pepper in a large bowl. Gradually whisk in oil. Add bell pepper, cucumber, onion, lentils and salmon; toss to coat.
Tip: To cook lentils: Place in a saucepan, cover with water and bring to a boil. Reduce heat to a simmer and cook until just tender, about 20 minutes for green lentils and 30 minutes for brown. Drain and rinse under cold water.