Minecraft Forge 1.8-11.14.3.1521 - A demonstration of adding a recipe using a vararg method in Scala http://www.minecraftforge.net/forum/index.php/topic,34579.0.html

ScalaRecipes.scala

package com.choonster.testmod3.init

import net.minecraft.init.Items
import net.minecraft.item.ItemStack
import net.minecraftforge.fml.common.registry.GameRegistry

/**
 * A Scala object that calls [[GameRegistry.addRecipe()]] to add a recipe.
 */
object ScalaRecipes {
  def addRecipes(): Unit = {
    GameRegistry.addRecipe(new ItemStack(Items.beef), "AAA", "AAA", "AAA", 'A', Items.rotten_flesh)
  }
}