Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
                        ***marinade***
     1/2  cup           olive oil
     1/3  cup           vinegar
     1/2  cup           orange juice
     1/4  cup           finely chopped onions
   4      drops         Tabasco sauce
   1      teaspoon      salt
   1      teaspoon      chili powder
     1/4  teaspoon      oregano
     1/4  tablespoon    lemon juice

Preparation:

Peel and devein the shrimp (large ones, 1/2 pound per person to be served). Let shrimp rest in the marinade for an hour or two. Thread them on skewers with small mushroom caps between each. Grill over slow fire for about ten minutes. Baste with marinade occasionally while cooking.