Even if you lack the proper crème brûlée equipment you can still half-ass this dish and it will taste like The Storming of the Bastille all up in your mouth. That's a good thing, I think. Anyway, the skill level required to make this is between Microwave Proficient and Novice so you might actually have a chance.
Combine the cream and milk in a small pot and bring to a boil over medium heat. Gently mix the egg yolks and sugar in a medium bowl. Pour the creamy milk into the sugary eggs, add the vanilla bean, and stir. If you don't have vanilla beans you can cheat and use 1/4-1/2tsp pure vanilla extract. Whatever. Fill the bottoms of two 7oz ramekins with blueberries and pour the creamy shit all over them. Bake at 225 degrees for an hour. Let them cool to room temperature. Sprinkle a layer of brown sugar on the top, break out your crack torch and start caramelizing. Since I quit smoking crack years ago, I used my broiler with mild success.
Some people use a bain-marie. You all know how I feel about double boiling and waterbaths. Go ahead and waste your time in a vain effort to feel all fancy and shit but you are fooling no one. I bet people who use a bain-marie also scald milk. Fucking dumbasses. Eat it.