baste, based

Based or based is the past tense ( yesterday, or some time ago ) of "base", meaning to found or establish something on, as if to set on a base, most commonly used figuratively--
The movie is based on a true story.
He based his suspicions on something she said, something that seemed to hint at a secret.

Baste or baste ( rhymes with based ) means to sew together loosely, in a temporary way, while making a garment--
Baste the two sides together with thread that doesn't match, so it will be easy to remove later.
Baste the collar together loosely; then sew it to the neckline of the shirt.

Baste also means to put liquid or fat on a roast or meat while cooking--
Don't forget to baste the turkey, so it won't dry out.
You can use a brush to baste the roast, using liquid from the bottom of the pan.

Now that you know that, you can say--
"The recipe is based on something I found in an old magazine; you have to baste the meat every 15 minutes."

Note--the past tense ( yesterday, or some time ago ) of "baste" is "basted"--
I basted the turkey every 30 minutes--I used an oven timer to remind me.