Use a food processor to make breadcrumbs from the crackers. In a large bowl, mix 75 ml of the breadcrumbs with the crab meat, avocado, chives, mayonnaise and pepper. Shape 2 patties by hand and place them on a large plate.
Place the rest of the breadcrumbs on another plate. Coat the patties with the breadcrumbs.
In a nonstick skillet over medium-low heat, brown the patties in the oil, 4 to 5 minutes per side or until golden brown.
Meanwhile, toast the hamburger buns. As a finishing touch, garnish with the baby spinach and the tzatziki sauce.
Cyberentrepreneur, blogger, food editor and mother of 3 little boys