Preheat oven to 350°.
In saucepan over medium heat, melt together butter, honey, and vanilla. Bring to boil for 1 minute, then remove from heat and add vanilla.
In a large bowl, mix together oats and nuts.
Pour butter mixture over oats and mix well.
Spread mixture evenly on baking sheet lined with parchment paper.
Bake for 20-25 minutes, stirring every 5 minutes.