Walnuts

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Rich in healthy unsaturated fats (particularly omega-3) and can be added to almost any dish.

Nutrition highlights:
Per 30g serving, there are 200 calories, 20g of fat, 2g of net carbohydrates (4g of carbohydrates and 2g of fiber), and 5g of protein.

Easy ways to enjoy:
1) Spread on a baking sheet and toast in the oven. Enjoy as a standalone snack.
2) Add to salad, green beans, cauliflower rice, and other vegetables.
3) Incorporate into breakfast by adding to yogurt, oatmeal, and chia pudding.

Reference:
https://fdc.nal.usda.gov/fdc-app.html#/food-details/418542/nutrients