Combine all of the marinade ingredients (olive oil through lemon zest) to a large bowl and whisk to combine. Add the tofu, onion & bell pepper and toss to coat. Set aside to marinate for 30 minutes.
Meanwhile, make the lemon yogurt sauce. Combine all of the ingredients in a bowl and stir to combine. Taste and adjust seasonings as needed.
Preheat the oven to 425 degrees and line a baking sheet with parchment paper. Add the tofu & veggies and spread in an even layer. Place in the oven and bake for 25 minutes, flipping after 15 minutes.
Serve the tofu & veggies over rice with shredded romaine, feta, pita and the lemon yogurt sauce.