1 cup plain Greek yogurt
1/2 cup heavy cream
1 tablespoon honey
2 tablespoons unsalted butter
2 firm apples, cored and chopped into small 1/2-inch cubes
2 tablespoons sugar
1/8 teaspoon ground cinnamon
1/4 cup walnut halves, toasted and coarsely chopped
Combine the yogurt, cream, and honey in a bowl, and beat vigorously with a hand mixer until the mixture thickens and forms soft peaks. (You can also use a stand mixer, or whip by hand using a whisk.)
Warm the butter in a large skillet over medium heat. Add the apples and 1 tablespoon sugar to the pan. Stir well and cook the apples for 6 to 8 minutes, stirring occasionally to avoid sticking, until they just begin to soften. Once softened, sprinkle the apples with the remaining sugar and the cinnamon, and cook for an additional 2 to 3 minutes. Remove from the heat and let sit for 5 minutes to cool slightly.
To serve, spoon a generous serving of whipped yogurt into each bowl and top with warm apples and toasted walnuts.