Preheat the oven to 350°F (175°C) and line a baking sheet with parchment paper.
In a small bowl, toss the ½ cup raw almonds with ½ tablespoon tamari until the almonds are evenly coated.
Spread the almonds in a single layer on the prepared baking sheet.
Roast the almonds for 10–14 minutes, stirring or shaking the pan once halfway through, until they are lightly browned and fragrant. Watch closely near the end to avoid burning.
Remove the almonds from the oven and let them cool for 5 minutes on the baking sheet.
While the almonds roast, prepare the lettuce: separate the leaves from the 2 small heads of soft (butter) lettuce, tear or chop into bite-sized pieces, and rinse and dry thoroughly. Place the lettuce in a large bowl.
Add a few spoonfuls of the half recipe of Lemon Vinaigrette to the lettuce and gently toss to coat (reserve additional vinaigrette for drizzling).
Add the 1 Persian cucumber (thinly sliced), ¼ cup shaved Parmesan, 2 tablespoons pepitas, 1 avocado (thinly sliced), and the cooled tamari-roasted almonds to the bowl; gently toss or arrange as desired.
Drizzle with more Lemon Vinaigrette to taste, top with ¼ cup microgreens, and season with flaky sea salt if desired. Serve immediately.