Beef Burgers With Caramelized Onions

• 4 medium onions, sliced
• 2 teaspoons sugar
• 2 teaspoons olive oil
• 1/4 cup water
• 2 teaspoons balsamic vinegar
• 3/4 teaspoon salt, divided
• 1 pound extra-lean ground beef
• 2 tablespoons tomato paste
• 1/4 cup chopped fresh parsley
• 1/4 teaspoon freshly ground pepper
• 4 hamburger buns, toasted
• 4 tomato slices

1. Cook onion and sugar in hot oil in a large nonstick skillet over low heat, stirring often, 20 to 25 minutes or until onion is caramel-colored. Stir in 1/4 cup water, vinegar, and 1/4 teaspoon salt. Set mixture aside, and keep warm.
2. Combine ground beef, tomato paste, parsley, remaining 1/2 teaspoon salt, and pepper; shape into 4 patties.
3. Grill, covered with grill lid, over medium-high heat (350u0b0 to 400u0b0) 4 to 5 minutes on each side or until no longer pink. Serve on buns with caramelized onion and tomato slices.

onions, sugar, olive oil, water, balsamic vinegar, salt, extralean ground beef, tomato paste, parsley, freshly ground pepper, buns, tomato slices

Taken from www.myrecipes.com/recipe/beef-burgers-with-caramelized-onions (may not work)