Make the baked lemon tofu bits: Preheat the oven to 375°F. Line a baking sheet with parchment paper.
Drain and rinse the tofu block and wrap in a clean kitchen towel. Set the tofu block on the countertop and place a large cutting board securely on top, followed by a heavy cast-iron skillet or heavy pot. Let the weight of the pot press the excess water out of the tofu for 15 minutes.
In a medium bowl, add the ginger, olive oil, lemon zest, lemon juice, Dijon mustard, miso, agave, dill, salt, and pepper. Whisk together.
Using your hands, break apart the tofu into small, rough chunks directly over the bowl and toss in the sauce to combine. Spread the tofu mixture evenly onto the prepared baking sheet and cook for 30-35 minutes, or until the tofu is golden and crispy. Stir after the 20-minute mark for a more even bake. Remove from the oven and set aside.
Make the lemon vinaigrette dressing: In a small bowl, combine all ingredients. Whisk to combine.
Assemble the salad: In a large salad bowl or large serving platter, arrange the spring greens, sprinkle with the quinoa, and decorate with the radish, avocado, edamame, and mint. Drizzle with the lemon vinaigrette and toss. (Alternatively, you can serve the vinaigrette on the side.)
Notes
Note: The lemon vinaigrette can be prepared up to 5 days in advance. Store in an airtight container in the refrigerator. Bring to room temperature and stir before using.