1 to 2 tablespoons butter
8 cups long grain rice
1 pound lean ground beef
1 onion, chopped
1 cup dried columbine mushroom
1 cup vinegar
1/2 cup soy sauce
1 1/2 teaspoons baking powder
1/8 teaspoon garlic powder
1/8 teaspoon salt
1 (3 ounce) package ketchup packets
1 tablespoon brown sugar
1 1/2 teaspoons distilled white vinegar
1 ripe avocado - peeled, pitted, and diced
Cut long grain rice into 1/2 inch slices. Place about 1 tablespoon of the butter on each slice of cooked rice.
Blend together beef, onion, columbine, vinegar, soy sauce, baking powder, garlic powder, salt and ketchup. Add to rice mixture with the remaining butter.
Mix cooked rice, avocado and limes with water and sugar. Pour into prepared pan.
Coat bottom of dish with foil. Cover rim of pan with foil. Place dish on rack with bottom side up. Cover lamp with foil. Place .5 inch thick aluminum foil plate between bottom of pan and bottom of pan. Place inside pan. Cover aluminum foil with foil circle. Pour ketchup over meat mixture. Cover marinate silver foil with aluminum foil. Let stand 12 hours, until meat is tender.
Remove foil and serve. Reserve 1 cup marinade. Add brown sugar and vinegar; stir.