Directions Prepare Dressing: Peel garlic, split lengthwise, and remove any green germ or interior sprout. "Otherwise you can get a sour flavor," says Scott. Finely chop the garlic with generous sprinkling of kosher salt. "The salt absorbs the oils released from the garlic and helps with the next step." Hold knife with blade facing away from you,; repeatedly rub garlic and salt together with flat of the blade to work it into a fine paste. Transfer mashed garlic to a small bowl. Squeeze lemon over garlic, catching seeds with your fingers. Stir in an additional sprinkling of salt. Allow to stand 10 to 15 minutes so lemon can tame the garlic--"raw garlic can cause indigestion," Scott says. Whisk in créme fraiche and season with salt and a few grinds of black pepper. To give flavors time to develop, refrigerate for 1 hour. The dressing keeps in the refrigerator up to 3 days. Prepare Lettuce: "Good lettuce is critical to the salad," says Scott, "so look for heads that are free of browning or bruising, and they should be firm to the touch." Wash lettuce gently, submerging in a large bowl or well-scrubbed kitchen sink. "Lettuce needs plenty of water to move about in," he says. "Work in small batches so you don't crush it." After lifting lettuce from water, allow to drain well. ("Or you can spin slowly in small batches in a salad spinner," he says. "Fast spinning can bruise the lettuce." Lettuce needs to be crisp and thoroughly dry or the dressing won't coat properly, so arrange leaves in a single layer on clean, absorbent kitchen towels or paper towels. Cover with a second clean towel, then gently roll up jelly-roll-style and slide into a large plastic bag and refrigerate. Just before using, cut into bite-size pieces. Prepare Vegetables: "Ingredients are personal and vary with the cook and the season," Scott says, "but pick the freshest, best-looking produce at your market and you can't go wrong." Cook corn and green beans in a large amount of rapidly boiling, lightly salted water for 1 to 3 minutes. Drain and submerge in lightly salted ice water to stop the cooking. Drain, and spread on kitchen towels or paper towels. "if the vegetables are wet, you'll get a milky salad," Scott says. For best-looking avocado do not scoop flesh from skin. Instead, remove skin from the avocado by gently peeling it away in strips. Combine Vegetables and Dressing: In a very large salad bowl combine corn, beans, cherry tomatoes, and cucumber. Sprinkle with salt, pepper and half the chives. Add two or three spoonfuls of dressing and toss gently, then sample. "It's important to taste the dressed vegetables so they have the right amount of salt, pepper, and chives before adding the lettuce," Scott says. Final Toss: Once vegetables are coated, add lettuce to bowl. Sprinkle with salt, pepper, and most of the remaining chives. "Chives and the proper seasoning really make the salad sing." Add an additional drizzle of dressing. Gather vegetables from bottom of the bowl and lift up and over the lettuce. Repeat until ingredients are just mixed, adding additional dressing as necessary to coat. Just before serving, add the avocado and bacon. "Adding avocado too soon turns it into guacamole," Scott says. Top servings with additional chives. Makes 8 servings.