Burgers Borracho - cooking recipe

Ingredients

1/4 cup chopped onion
2 tablespoons tomato paste
4 cloves garlic, minced
1 teaspoon salt
1/2 teaspoon dried rosemary
1/2 teaspoon pepper
1/4 teaspoon ground allspice
1 1/2 lbs lean ground beef
1 1/2 cups beer
3 tablespoons coarse grain mustard
3/4 teaspoon Worcestershire sauce
1 tablespoon beer
lettuce leaf
onion, slices
6 hamburger buns, grilled or toasted

Preparation

In a bowl, add onion, tomato paste, garlic, salt, rosemary, pepper, and allspicep; mix well.
Add the ground beef; using hands, mix well.
Shape mixture into 6 patties.
Put patties into a shallow container.
Pour 1 1/2 cups beer over patties.
Cover and place in the refrigerator to marinate for 6 to 24 hours, turning the burgers at least once.
Right before you are ready to grill, mix together mustard, worcestershire sauce and 1 tablespoon beer in a small bowl.
Remove patties from from container and discard marinade.
Place patties on a grill over medium heat.
Grill for 14-18 minutes or until desired degree of doneness, turning once.
Serve patties on buns with mustard sauce, lettuce and onion slices.