As the nurse assessing miguel, what is the most appropriate nursing intervention to address his malnutrition and promote nutritional rehabilitation ?

A 3-year-old child named Miguel Calizo is brought to the pediatric clinic by his mother. Miguel appears lethargic, with dry, flaky skin, and his mother reports a decreased appetite and frequent episodes of diarrhea. Upon assessment, Miguel’s weight and height are below the 5th percentile for his age group. His mother mentions that they have been struggling financially, and she has been feeding Miguel mostly rice and minimal vegetables due to budget constraints.