Meyer lemon, quartered • Lobster Tails, quarter pound each, diced lobster meat served in tails • large onion, quartered • sea salt • Idaho baking potato, half pound, halved, hollowed out, scrubbed and diced • large ripe Hass avocado, half pound, hollowed out, diced • boursin garlic and herb cream cheese, 5 ounces, diced • heavy cream • minced shallot • minced garlic clove • all-purpose flour • unsalted butter •