Except for kaiser rolls, place all ingredients plus 1/4 cup (60 mL) of water in a large bowl and mix gently until just combined. Without compacting the meat too tightly, form 12 patties.
Preheat grill to high. Cook burgers about 6 min. per side or until an instant-read thermometer reaches 160°F (71°C) when inserted into centre of burger. Allow to rest 5 min.
Mix ranch dressing with chopped fresh dill. Dress each burger with a drizzle of the ranch sauce. Add sliced fresh avocado, a squeeze of lemon juice and a tuft of alfalfa sprouts, if desired.
We skipped the fillers to let the beef shine through in our juiciest burger ever. Our secret? A bit of water to keep it moist. Break out of your usual burger routine with these tasty topping alternatives.