"Create a complete session mead recipe with vanilla as the star ingredient, using Costa Rican vanilla beans. The recipe should be for a 1-gallon batch, using 3-4 lbs of honey, water to reach volume, wine yeast (D47 or EC-1118), yeast nutrient, and optional spices like cinnamon, cloves, or cardamom. Include detailed steps for sanitizing, fermenting, racking, macerating, and aging, with tips on honey types and vanilla preparation. Use imperial units."