Pepper Burgers With Caramelized Onions

• 2 extra large sweet onions
• 1 (10 1/2 ounce) can chicken broth or 1 (10 1/2 ounce) can beef broth, undiluted
• 14 cup butter
• 1 lb ground beef
• 14 teaspoon salt
• 14 teaspoon white pepper
• 14 teaspoon fresh ground black pepper
• 14 teaspoon ground red pepper
• 14 teaspoon paprika
• 1 cup caramelized onion
• 2 teaspoons white balsamic vinegar
• lettuce leaf
• roll

1. Onions:.
2. Cut onions in half; cut each half into 1/2 inch thick slices.
3. Combine all ingredients in a 3 1/2 quart slow cooker.
4. Cook, covered, at HIGH 8 hours or until golden brown and very soft.
5. Store onions in an airtight container; refrigerate up to 2 weeks or freeze up to 2 months.
6. Yield: 2 cups.
7. Burgers:.
8. Shape beef into 4 patties.
9. Combine salt and next 4 ingredients; sprinkle evenly over both sides of patties.
10. Grill, covered with grill lid, over medium-high heat 5 minutes on each side or until beef is no longer pink.
11. Cook caramelized onions and vinegar in a saucepan over medium heat 5 minutes or until thoroughly heated.
12. Spoon over burgers.
13. Top with lettuce, and serve on rolls.

sweet onions, chicken broth, butter, ground beef, salt, white pepper, ground black pepper, ground red pepper, paprika, caramelized onion, white balsamic vinegar, roll

Taken from www.food.com/recipe/pepper-burgers-with-caramelized-onions-118126 (may not work)