For lighter grilling try this spicy burger which freezes well. This came from Cooking Light. I always have leftover Italian turkey sausage after making a batch of these for my freezer, so I use the leftover sausage to make Recipe#244750.
Remove casings from sausage. Combine sausage, oregano, basil, salt, fennel seeds, and ground sirloin. Divide beef mixture into 6 equal portions, shaping each into a 1/2 inch patty.
Place patties on a grill rack coated with cooking spray; grill 5 minutes. Turn patties over; grill 2 minutes. Divide fresh mozzarella cheese evenly over patties, and grill an additional 5 minutes or until a thermometer registers 165 degrees. Remove from grill; let stand 5 minutes.
Place rolls, cut side down on grill rack; grill 1 minute or until toasted. Place 1 patty on bottom half, top with 2 tablespoons of sauce, and top with other half of roll.