Bacon Swiss Burgers with Tomato and Avocado

Name: Bacon Swiss Burgers with Tomato and Avocado
Ingredients: 8 slices bacon; 1 pound ground beef chuck or sirloin; 1 teaspoon Worcestershire sauce; 1 or 2 dashes Tabasco sauce; 1/4 teaspoon dried thyme leaves; Salt and freshly ground black pepper, to taste; Vegetable oil, for grilling; 4 slices Swiss cheese; 4 hamburger buns, toasted, for serving; Thinly sliced ripe tomato, for garnish; Thinly sliced red onion, for garnish; Sliced ripe avocado, for garnish; Boston lettuce leaves, for garnish