Bring a medium pot of water to a boil, add the asparagus and cook until tender yet firm, about 2 to 3 minutes. Drain and run under cold water to stop it from cooking further. Set aside.: You will hear the water slapping the sides and see steam rise when the pot reaches a full boil, that sound tells you it is hot enough. When the asparagus goes in, watch for a rapid return to a simmer, and set a timer; the stalks should be vibrant green and still offer a slight resistance when pierced with a fork. Immediately drain and run under cold water to stop the cooking process, which preserves the crisp texture and bright color. Doing this prevents limp, overcooked asparagus which can make the salad soggy. A common mistake is leaving the asparagus in hot water too long, so trust the timer and test one spear before deciding.
In a small bowl combine the oil, lemon juice, salt and pepper.: As you whisk, the dressing should emulsify into a glossy, slightly thickened liquid, and the citrus scent will become pronounced. The aroma of fresh lemon juice should cut through the richness of the extra virgin olive oil , giving a lively top note. Taste as you go to balance the salt and pepper; the dressing should be bright, not overly acidic. Avoid adding too much salt early, because once mixed with the salad ingredients the seasoning intensifies. If the dressing tastes flat, add a touch more lemon juice .
In a large bowl combine the asparagus, lobster, tomatoes, red onion, basil and dressing. Divide equally in 2 bowls and eat right away.: When you fold these together you should notice the different textures mingle, the soft, flaky chunks of lobster contrasting with the crisp asparagus and the juicy burst of cherry tomatoes . The scent will become layered citrus, herb, and ocean from the lobster . Toss gently to coat without breaking up the lobster pieces; excessive stirring will turn the salad into a paste. If the mixture seems watery from the tomatoes, drain briefly before combining. A common issue at this stage is over tossing, which bruises the ingredients, so use a light hand.
Divide equally in 2 bowls and eat right away: Serving immediately preserves the bright textures and prevents the dressing from softening the vegetables. The first forkful should deliver a contrast of cold and tender lobster , crisp asparagus , and the juicy snap of cherry tomatoes . If you must wait before serving, chill briefly, but know that prolonged sitting will dull the crispness and the basil will darken. Many people mistakenly refrigerate for too long after dressing; to avoid this, plate at the last minute and serve.