Spinach and Beef Burgers

I was looking for some fun ways to use spinach and gave this recipe a shot. It was really good. It had a nice Italian flavor. A nice way to shake up the burger.

Recipe from: Cheese-Burger.net

• 1 pound ground beef
• 1 1/2 cups chopped fresh spinach (I think I could have added a little more, too)
  
• 1/2 cup fine dried breadcrumbs
• 3/4 cup finely chopped onion
• 2 tablespoons finely chopped bell pepper (I used dried)
  
• 2 tablespoons dijon mustard
• 4 slices mozzarella cheese (I had some shredded Italian cheese blend, so I used that)
  

Method:

• Pre-heat a grill. Combine the beef, spinach, breadcrumbs, onion, bell pepper and dijon mustard in a large bowl and mix well.
• Shape the meat into 4 equal size patties and place on the grill and cook until the meat is cooked.
• Top with a slice of mozzarella cheese for the last minute to let the cheese melt.

Here's what the patties looked like before I grilled them: