express server rendering nutritionix fooditem JSON response after request-promise request

index.js

var express = require('express')  
var rp = require('request-promise')  
var bodyParser = require("body-parser");


var app = express()

app.use(bodyParser.urlencoded({extended: true}));
app.use(bodyParser.json());

app.get('/:fooditem', function(req, res) {  
  rp({
    uri: 'https://api.nutritionix.com/v1_1/search',
    qs: {
      q: req.params.fooditem,
      appId: '',
      appKey: ''
    },
    json: true
  })
    .then(function(data) {
      res.send(data)
    })
    .catch(function(err) {
      console.log(err)
      res.send('error')
    })
})

app.listen(3000)