Final answer:
Blend underweight baked or sweet potatoes into mashed potatoes to utilize them without compromising dish quality.
Step-by-step explanation:
When encountering underweight baked or sweet potatoes, the appropriate action would depend on the quality and context of their intended use. Serving such potatoes on kids' meals only (option A) is not advisable, as all customers deserve quality products. Option B, harvesting them, is not applicable since the potatoes are already harvested. Using them for any entrée (option C) could negatively impact the quality of the meal served. The best option from the ones provided is D, to blend them into our mashed potatoes. This allows for the utilization of the underweight potatoes without compromising the quality of the dishes served, as the consistency and flavor can be adjusted during the mashing process.