Combine butter, TABASCO® Habanero Sauce, and salt in a small bowl and mix well; set aside. Divide cheese equally among 4 pieces of the bread and top with remaining bread slices.
Brush sandwich tops with butter mixture and place butter-side-down in a large skillet over medium-low heat. Brush tops with remaining butter and cook until golden, about 4 minutes. Flip sandwiches over, and cook until golden brown, about 4 minutes more. Serve hot.
Makes 4 servings.