index.js

// Please pass `names` and `foods` from Zapier
// If you want to filter by food name, plz pass `specificFood` from Zapier
const names = inputData.names;
const foods = inputData.foods;
const specificFood = inputData.specificFood;

const delimitor = ','; // If you want to change delimiter, fix this line
const nameList = names.split(delimitor);
const foodList = names.split(delimitor);

let outputText = 'Name\tFood Restriction'; // Headline

for (var i = 0; i < nameList.length; i++) {
  const name = nameList[i];
  const food = foodList[i];
  
  // If name is empty, stop processing
  if (name === '') {
    break;
  }
  
  // Filter by specific food name
  if (specificFood && food !== specificFood) {
    continue;
  }

  outputText = outputText + "\n" + `${nameList[i]}\t${foodList[i]}`; // Row
}

// You can get value named `listText` on Zapier 
output = [{
  listText: outputText,
}];