For Relish:
• Peel onions and cut off both ends.
• In a medium bowl, coat onions with
  olive oil and sprinkle with 1/2 teaspoon of salt and pepper. Wrap each onion in aluminum foil and
  grill over medium heat for approximately 1 hour or until they are softened. Allow to cool.
• Cut
  onions into 1/2 inch pieces. Place in medium sized saucepan over medium-high heat. Add 1/2 teaspoon
  salt, ketchup, wine, vinegar, and tobasco sauce. Stir mixture and bring to a boil.
• Remove
  from heat, stir in parsley.

For Burger:

• In a large bowl, combine pork,
  ketchup, salt, allspice, mustard, pepper, and tobasco sauce. Shape into 6 equal sized patties.
  
• Grill over medium heat 10-12 minutes, turning once, until done.
• Serve on a toasted bun
  with onion relish.