Wash and chop romaine lettuce and add to a large bowl. Add in halved cherry tomatoes, chopped cucumber, radishes, parsley, and sunflower seeds. Toss everything together, set aside.
In a mason jar, combine olive oil, fresh juice from lemon, maple syrup, dried thyme, minced garlic, sea salt, and pepper. Give it a good shake to mix it all together.
Drizzle dressing over top of the salad and mix everything together. Scoop on to serving plates and top with sliced hard-boiled egg (optional). Serve and enjoy!