Press the tofu for at least 30 minutes. The best method is to use a tofu press, but you can also press tofu by putting the block of tofu between two dish towels and placing something heavy on top - like a cast iron pan or a pile of cookbooks.
While the tofu is being pressed, mix together the tofu sauce. Also, prepare the bell peppers and onions by slicing them then tossing with the oil and seasonings.
Pre-heat the oven to 425°F degrees.
Line a baking sheet with parchment paper or a silicone baking mat.
Slice the tofu into about ½ to 1-inch sticks. Lay the tofu on half of the baking sheet and the peppers & onions on the other half.
Bake for 25-30 minutes. Halfway through the baking time, toss the peppers and onions. Flip the tofu and brush with more sauce.