Prepare grill or broiler.
To prepare mayonnaise, combine first 5 ingredients in a food processor; pulse 10 times or until combined. Cover and chill mayonnaise mixture.
To prepare burgers, remove casings from sausage. Place sausage, salt, tortillas, chicken, and jalapeño in food processor; process 30 seconds or until mixture is coarsely ground. Divide mixture into 8 equal portions, shaping each into a 1/2-inch-thick patty.
Place patties on a grill rack or broiler pan coated with cooking spray; cook 7 minutes on each side or until done.
Cut rolls in half horizontally; spread 1 1/2 tablespoons mayonnaise mixture over top half of each roll. Place tomato slices on bottom halves of rolls; top each with 1 patty and top half of each roll.