Photo: Romulo Yanes
How to Make It
Step 1
Preheat oven to 350ºF with a rack in center. In a pan, melt butter with rosemary, red pepper flakes and salt.
Step 2
Spread walnut halves on a large baking sheet. Pour butter mixture over and toss to coat.
Step 3
Bake, stirring occasionally, until golden, 20 to 25 minutes.