fashion (something) on (something else)
To use something as the template or model for the way in which something else is created or developed. The mayor's ambitious social security plan is fashioned after a similar system already in place in Sweden. You can fashion your lesson plans after ones from previous teachers.
fashion something on something
to model something on something else; to pattern something after something else. She fashioned her dress on something she had seen in a history book. Donna fashioned the plan on the one Robert had used.