Prepare a baking tray by covering it with parchment paper. Set aside.
In a large microwaveable bowl, gently heat the white baking chips in short 15 to 30-second bursts, stirring after each interval, until completely melted and smooth. A stovetop double boiler can also be used if preferred.
Once fully melted, whisk in the lemon juice until the mixture is well blended and smooth in texture.
Using a rubber spatula, fold in the lemon zest along with the quick oats. Mix until the dough becomes cohesive and thick enough to scoop.
Using a tablespoon-sized cookie scoop, portion the dough onto the prepared tray, spacing the mounds about 2 inches apart. Flatten each portion into a round disc approximately 1/4 inch thick using your fingers or the back of a spoon. Smooth the edges if desired, as the cookies will not spread while chilling.
If desired, top each cookie with an additional pinch of lemon zest to enhance flavor and visual appeal.
Place the tray in the refrigerator and chill for 30 to 60 minutes, or until the cookies are firm to the touch and easily lifted from the parchment.
Allow the cookies to rest at room temperature for 10 to 15 minutes before serving for a softer bite, or enjoy them directly from the fridge for a chewier texture. Store any remaining cookies in an airtight container in the refrigerator or freezer for extended freshness.