Preheat oven to 400°F and line a baking sheet with parchment paper.
Press the tofu for 15 minutes to remove excess moisture, then cut into 1-inch cubes.
In a large bowl, whisk together the olive oil, garlic powder, oregano, thyme, salt, and pepper.
Add the tofu cubes to the bowl and toss gently to coat each piece evenly.
Sprinkle the nutritional yeast over the tofu and toss again until a light crust forms.
Spread the tofu in a single layer on the baking sheet and bake for 25-30 minutes, flipping halfway through.
While tofu bakes, steam the green beans until tender-crisp, then drizzle with lemon juice.
Serve the crispy tofu alongside the bright green beans for a high-protein, clean meal.