Ingredients

• 1 egg
• 1 small onion grated and drained
• 1/4 cup dried bread crumbs
• 1/2 teaspoon salt
• 1/4 teaspoon pepper
• 1 lb lean ground beef
• 3/4 sweet onions cut in 4 thick rounds
• 2 teaspoons olive oil
• 1 pinch salt
• 1 pinch pepper
• 4 hamburger buns

Cheese Filling:

• 1 cup shredded old Cheddar cheese (about 3 oz/85 g)
• 1/4 cup cream cheese softened
• 1/4 cup chopped drained pickled jalapeño pepper
• 2 tablespoons chopped fresh parsley

Tomato Salad:

• 1/4 sweet onion thinly sliced
• 2 tablespoons chopped fresh parsley
• 2 tablespoons extra-virgin olive oil
• 1 tablespoon lemon juice
• 2 teaspoons chopped fresh oregano
• 1/2 clove garlic minced
• 1 pinch salt
• 1 pinch pepper
• 1 lb tomato cut in wedges