A nice option is to take the marinated tofu and place it on a grill. One of the new indoor grill plates is a very simple option.
Perhaps the most familiar preparation method is stir-frying or sautéing tofu. It's wise to cook the vegetables and tofu separately so that you don't break up the tofu. Then after you've cooked them both, you can add them together in a single pan and add your sauce.