Preheat the oven to 400°. Poke holes in the sweet potato with a fork and bake it until tender. This should take about 1 hour. You can also microwave it for about 5 minutes for faster results if you choose.
While the potato is cooking, boil the water and add the quinoa. Simmer it until all the water is absorbed. You'll also need to boil the peas according to the instructions on the packaging.
Slice the banana and chop the sweet potato into pieces suitable for your pet's size.
Mix the quinoa, sweet potato, peas and banana together in a medium-sized mixing bowl.
Let it cool before serving.
Notes
Store any leftovers in an airtight container in the refrigerator for 3-5 days. You can also store it in an airtight container in the freezer for up to 1 month for long term storage.