Basil Pesto Burgers

These burgers were so good! The recipe below is for 12 patties so reduce it accordingly or make all the patties and freeze the ones you don't use for another night.
Basil Pesto hamburgers
Makes 12 burgers.

3 lbs lean ground beef (not previously frozen!)
3 bread slices, crumbed (white or brown bread is fine)
2 onions, chopped
3 eggs
3/4 cup Parmesan cheese
6 tbsp pesto
3 garlic cloves, minced

Optional Basil Mayo (enough for 4 burgers)
1/4 cup mayonnaise
2 tbsp pesto
In a large bowl, combine egg, bread crumbs, onion, cheese, pesto and garlic, mixing well. Add ground beef, stirring until fully combined. Divide into 12 and make 12 burgers (about 5" in diameter), making sure to depress the center of each slightly. Grill to desired doneness. Top with desired toppings.

I sauteed the onion before adding it to meat mixture. I topped mine with just a tomatoe and provolone cheese. Mmmmmmmmm!