In a pot for which you have a lid, place the carrots, peas and potato with 3/4 cup water and bring to a boil. Cover and reduce to a medium-low heat and steam for 20 minutes until the vegetables are soft.
Take the lid off and add the oil and cumin to the vegetables, stirring well for about a minute, until the spice is well incorporated. Puree or mash and serve for a classic and tasty baby meal or leave in chunks and serve for baby to pick up and enjoy. Alternatively, add salt and serve as a veggie side dish for toddlers and older kids.