Start by rinsing and patting dry the Ahi tuna steak. Season lightly with a pinch of salt and pepper.
Heat a non-stick skillet over medium-high heat and add the olive oil. Once shimmering, sear the Ahi tuna for about 1-2 minutes on each side to achieve a nice crust while keeping the center rare.
Remove the tuna from the skillet and let it rest while you prepare the vegetables.
In a bowl, combine the cooked brown rice, shelled edamame, shredded carrots, and diced cucumber.
In a small bowl, whisk together the lemon juice and grated ginger to create a light dressing.
Drizzle the dressing over the rice and vegetable mix, then gently toss to combine.
Slice the seared Ahi tuna into thin strips or cubes.
Arrange the seasoned rice bowl on a plate, place the tuna slices on top, and add sliced avocado over the bowl.
Finish by sprinkling sesame seeds over the dish for a subtle nutty flavor and extra crunch.
Serve immediately and enjoy this refreshing, protein-packed meal.