Creme Brulee French Toast

INGREDIENTS

• 1/2 cup unsalted butter
• 1 cup packed brown sugar
• 2 tablespoons corn syrup
• 6 (1-inch thick) slices French bread
• 5 eggs
• 1 1/2 cups half-and-half cream
• 1 teaspoon vanilla extract
• 1 teaspoon brandy-based orange liqueur (such as Grand Marnier®)
• 1/4 teaspoon salt