Heat beer over medium heat with the bouillon cube, until boiling.
Add cheese, garlic and pepper. Once the molten mixture, mix the cornstarch in water. Stir the cornstarch into the cheese. Mix well to make it homogeneous.
Remove the pot from the heat and place it on the stove. Place grilled after the picnic fondue and dip the bread in the cheese. Remove the piece of bread and eat it with a fork.