In a food processor, process the carrots, bell pepper, and garlic, until crumbly and broken down. Then add the chickpeas, nutritional yeast, tomato paste, tahini, rosemary, sea salt, Dijon mustard, black pepper, and vinegar and process through. Stop the processor a few times and scrape down the sides, and continue to process until smooth. Then add the rolled oats and pulse through. Remove the bowl from the processor and place in the fridge to chill the mixture for about a 1/2 hour. You can skip this process but it helps make the burgers easier to shape. After chilling, take out scoops of the mixture and form burgers in your hands. I scoop generously with an ice cream scoop, roughly 1/3–1/2 cup for each. To cook, place the patties on a nonstick skillet that has been wiped with a touch of oil over medium/medium-high heat (see note for oven baking). Let cook on one side for 7–8 minutes, or until golden brown. Then flip, and let cook for another 5–7 minutes on the other side. Serve on buns with the fixings of your choice (see ideas)