const ingredients = {
  bacon: 2,
  meat: 3
}

const newIngredients = Object.keys(ingredients).map(igkey => {
  return Array(ingredients[igkey])
})
console.log(newIngredients_1)

const newIngredients_2 = Object.keys(ingredients).map(igkey => {
  return [...Array(ingredients[igkey])]
})
console.log(newIngredients_2)