Wrap the tofu in a kitchen towel to remove moisture.
Slice the tofu into 1cm thick pieces.
Cut the bagel in half.
Heat olive oil in a pan and grill the tofu slices on both sides until golden.
Lightly toast the cut sides of the bagel.
Spread mustard sauce on one side of the bagel.
Add the grilled tofu, tomato slices, and lettuce.
Cover with the other half of the bagel.