Salmon
A great source of essential proteins, salmon is undoubtedly one of the best-tasting healthy foods you can get. It contains omega-3 fatty acids which are very beneficial for heart health as long as you don't consume too much. The American Heart Association suggests that you eat food with omega-3 twice a week. This leads to many heart and body benefits. Salmon tastes delicious, is amazingly versatile, and can be cooked by nearly anyone.
Chicken

As long as you don't fry your chicken in greasy fats, it's actually quite a healthy meal. Chicken is widely accepted as a delicious food, and the sheer choices of what you can do with it are limitless. It's mainly an excellent source of protein (4 ounces of chicken breast contain 67.6% of your daily value), but it also contains various nutrients that can help prevent cancer. For example, niacin (72% DV in 4 ounces) and selenium (40% DV in 4 ounces) abound in chicken. It also contains vitamin B (32% DV in 4 ounces), excellent for heart health.
Watermelon

This great, delicious fruit contains only 48 calories per cup, but the amount of vitamin A (11.1% DV in 1 cup), B(around 20% DV in 1 cup), and C(24.3% DV in 1 cup) it has is far from small. These values make the calorie to nutrient ratio very good - you get a lot of benefits from a small amount with little repercussion. It also contains lycopene, which studies have shown is beneficial in preventing cancer.
Romaine Lettuce

Romaine is by far the best, as lettuce goes, ingredient to put in a salad. It contains great amounts of vitamins K, A, C, and other nutrients. Folate manganese, chromium potassium, and dietary fiber abound in Romaine lettuce. This food benefits your heart by reducing risk of stroke, heart attack, artery clots, and more. It's quite good, too, especially for its calorie content.
Corn

Corn is an excellent provider of vitamin B1, folate, dietary fiber, and more. It has heart benefits from the folate - it's estimated that if American's consumed 100% of their daily value of folates, the risk of heart attack would reduce by 10%. It also reduces risk of lung cancer as it contains crytponxanthin (studies show it can reduce risk by 27%). In addition to all of that, it keeps you energized with its pantothenic acid. Corn is a good addition to any meal, both flavor- and health-wise.