Eat foods in season.

"If you don't love certain fruits or vegetables, it could be because you ate them out of season when they have little taste or flavor," says Pensiero. "When you eat seasonally, fruits and vegetables are more flavorful, at their best, and I promise you won't be disappointed."

At GiGi's Trattoria, her restaurant in Rhinebeck, N.Y., she serves simple fruit desserts, like naturally sweet strawberries topped with aged balsamic vinegar, or low-fat yogurt or fresh berries in a compote.