Mash beans and garlic with a potato masher. Add lime juice, cumin and ground coriander. Season with salt and pepper. Divide into 8 parts.
Spread 1 part of mashed bean mixture over whole tortilla. Add roasted red peppers and avocado evenly around tortilla and sprinkle with some cheddar cheese.
Roll up the tortilla. Wrap in plastic wrap tightly and let cool in fridge for 10 minutes to overnight.
Cut roll into 1 inch pieces. Enjoy as is or with a sour cream dip.