Place roughly chopped lettuce in a large mixing bowl. To this, add avocado, cubed, cooked corn, halved cherry tomatoes, cubed pepperjack cheese, crispy shallots, and cilantro. Add chopped chicken, if using.
Turn the ingredients out onto a cutting board, then roughly chop into bite size pieces with a knife.
Return the chopped salad to the mixing bowl, then drizzle as much cilantro lime dressing as you like. Toss the salad with tongs, then transfer to a large bowl. Taste and adjust seasoning as needed. Serve immediately with an extra sprinkling of crispy shallots.