When introducing solid foods to your baby, single-ingredient fruit and veggie purees are the best place to start. Yam or Sweet Potato Puree. ... Acorn or Butternut Squash Puree. ... Green Pea Puree. ... Green Bean Puree. ... Avocado Puree. ... Apple Puree. ... Pear Puree. ... Plantain or Banana Puree.