Butter bread and cut into small cubes.
Combine buttered and cubed bread, brown sugar and raisins in a one-quart microwave safe dish.
In a microwave safe bowl or measuring cup, blend together the eggs, milk, cinnamon, salt, and vanilla.
Heat on high for 2-3 minutes until hot, but not boiling.
Pour over bread mixture and lightly blend together.
Microwave uncovered at 50% power for 5-8 minutes, or until edges are firm and the center is almost set.
Let rest for 10 minutes before serving.
Refrigerate leftovers within 2 hours.
