1. Place crackers in a food processor; process until finely ground.
2. Combine mayonnaise, sour cream, and egg in a large bowl; stir with a whisk. Stir in 1 cup cracker crumbs and minced chives. Gently fold in crabmeat and chopped tomato. Form mixture into 6 (1-inch-thick) patties. Dredge cakes in remaining cracker crumbs. Chill cakes 30 minutes.
3. Heat canola oil in a large nonstick skillet over medium-high heat. Add crab cakes, and cook 4 to 5 minutes on each side or until browned. Serve crab cakes with Jalapeño-Lime Tartar Sauce.
NOTE: Nutritional analysis totals include Jalepeño-Lime Tartar Sauce.