Barbecued Shrimp Blt Sandwich

Name: Barbecued Shrimp Blt Sandwich
Ingredients: 1 teaspoon vegetable oil, plus 3 tablespoons; 3 ounces (about 5 large) shallots, peeled and sliced; 1/2 cup dry white wine; 1 tablespoon Champagne vinegar; 1/2 cup heavy cream; 1/2 cup (4 ounces) unsalted butter, cut into small pieces; 1/2 lemon, juiced; Salt; White pepper; 1/2 pound (about 20 small) peeled shrimp; 1/2 cup mayonnaise, preferably homemade; 12 thin slices sourdough bread; 2 cups baby lettuce or 8 nice pieces romaine or iceberg lettuce; 1 (1/2 pound) tomato, cut into 12 thin slices; 6 ounces (12 thick slices) bacon, cooked and drained; Black pepper