1 Place canola mayonnaise ingredients in a blender, secure lid, and puree until smooth.2 Place beans in a gallon-size resealable bag. Using a meat mallet, pound beans to a coarse texture, resembling lumpy mashed potatoes. Place beans in a medium bowl and add bell pepper, oats, egg whites, canola oil, and cayenne pepper. 3 Mix well and shape into four patties.4 Coat a large nonstick skillet with canola oil cooking spray and heat over medium heat. Add patties and cook 4 minutes on each side or until they begin to lightly brown. The patties will be fragile, so be sure to turn them gently.5 To assemble, spoon 1 Tbsp (15 mL) canola mayonnaise mixture on each bun half. Top each bottom bun with burger, onion, a tomato slice, and a lettuce leaf. Place bun tops over each. Serve with lime wedges.