Add potatoes to a small saucepan and add warm water until just covered. Bring to a boil over high heat, then reduce heat slightly to medium / medium-high until the water is at a low boil. Cook uncovered for 10-12 minutes, or until completely tender and when picked up with a knife they slide off easily. Then drain thoroughly and let cool on a cutting board. Once slightly cooled, slice into 1/4-inch slices. Set aside.
While potatoes are cooking, fill a medium saucepan halfway with water and bring to a boil. Then add green beans or haricot verts and boil for 2-4 minutes, or until bright green in color and only slightly tender - they should still have slight crunch when bitten. While they're cooking, fill a large mixing bowl with ice water. Once the green beans are done cooking, drain thoroughly and immediately add to the ice water to stop the cooking process. Drain and pat dry - set aside.
Add drained, rinsed chickpeas to a small mixing bowl, along with sea salt, mustard, maple syrup, dill, and sunflower seeds. Stir to combine and mash a few chickpeas to create texture. Set aside.
Add dressing ingredients to a mason jar (or whisk in a small mixing bowl) and shake vigorously to combine. Set aside.
To serve, divide lettuce between two large serving bowls (amount as original recipe is written // adjust if altering batch size) or plates and top with chickpeas, green beans, potatoes, olives, tomato and beets (optional). Serve with dressing. Best when fresh, though leftovers pack/keep well up to 2 days when the dressing is stored separately. Store extra dressing (well-sealed) at room temperature in a dark place up to 2-3 days.