drain water from tuna can .

put tuna in a bowl

cook steam'able veggies according to package.

after the veggies are cooked add them to the tuna mix together. optional add a dash of salt to taste

grab your tostadas add tuna with mix veggies and squeeze lime to taste

slice tomato and add them to your tostadas

optional add hot sauce. I recommend Valentina or Louisiana hot sauce.