Oatmeal
When it gets cooler, it's the perfect time to break out the oatmeal. Oats are a whole grain, so you'll get a dose of fiber and plant-based protein to stop hunger with just one bowl. Plus, oatmeal contains a powerful starch called beta-glucan. Research in Nutrition Reviewsfound that just 3 grams a day of the beta-glucan in oats mayreduce your bad cholesterol levels by 5 to 10%, whether they start out normal or high. You can get extra nutrition if you choose the right toppings too. "To get some healthy fat mixed in, I add almond butter and chia seeds," says Keri Gans, RD, a dietitian in New York City and author of The Small Change Diet.