Horseradish Hamburgers

Ingredients

• 1 pound ground sirloin 
• 1.5 tablespoons horseradish prepared
• 0.3 cup italian-seasoned breadcrumbs 
• 2 inch purple onion 
• 9 ounce kaiser rolls split toasted

Equipment

• grill

Directions

1. Combine first 3 ingredients, stirring well; shape into 4 (1/2-inch-thick) patties.
2. Coat grill rack with cooking spray; place on grill over medium-hot coals (350 to 400).
3. Place meat patties and onion slices on rack; grill, covered, 5 minutes on each side or until meat is done.
4. Place 1 pattie and 1 onion slice on bottom half of each roll. If desired, add mustard and ketchup. Top with remaining roll half.