Quarter or half the white onion and add it to a food processor with the carrots. Blend until they are broken down into tiny pieces. Add the rest of the ingredients to the food processor (except the oats and breadcrumbs). Blend until all of the veggies and chickpeas have broken down and there is a smooth consistency.
Add the rolled oats to the food processor and pulse to incorporate. Pour in about half of the breadcrumbs and mix into the veggie mixture using a spoon.
To bake: prepare two baking sheets with parchment paper. Spoon a large scoop of the veggie mixture onto the baking sheet and use the spoon to shape it into a burger patty. After you have shaped about half of the patties, mix in the remaining breadcrumbs and continue shaping. Once you have shaped all the veggie burgers, drizzle with olive oil. Bake at 400°F for about 30-40 minutes or until they are slightly golden brown.
To fry: heat a frying pan with olive oil. Add a scoop of the veggie mixture to the pan and shape into a burger patty using a spoon. Once the bottom has turned golden brown flip and cook for an additional 3-5 minutes, or until the patty has finished cooking though.
Serve the burger patty on a roll and enjoy!