1 Combine walnuts and maple syrup in a large bowl; mix until evenly coated. Stir in sesame seeds.2 Spread on non-stick, or parchment paper-lined baking sheet. Bake at 325°F for 25 minutes, stirring twice, until walnuts are lightly browned.3 Cool on baking sheet; walnuts will become dry and crunchy as they cool. Store in airtight container in refrigerator.