Step 1

Preheat oven to 350°F. Butter 8x8x2-inch metal baking pan. Combine first 3 ingredients in heavy medium saucepan. Stir constantly over medium-low heat until butter melts, sugar dissolves, and mixture is smooth. Remove from heat. Add oats and salt; stir until coated. Transfer mixture to prepared pan and spread out in even layer.

Step 2

Bake until top is golden (edges will be darker), about 25 minutes. Cool in pan on rack 5 minutes. Cut into 4 squares; cut each into 4 triangles (mixture will still be soft). Cool completely in pan before serving.