Slice the whole wheat bagel in half.
Wrap the tofu with a paper towel to remove excess moisture, then slice into 1cm thick pieces.
Heat olive oil in a pan and grill the tofu on both sides until golden brown.
Lightly toast the bagel in a toaster or on a pan.
Place the grilled tofu on the bagel and add vegetables or sauces as desired.
Cover with the other bagel half to finish.