Butter or spray a 9-inch pie dish. Core pears, then slice 1/4 inch thick lengthwise (I didn’t peel mine). Arrange slices, overlapping slightly, in a circle in the buttered pie pan.
In a blender, process remaining ingredients, except powdered sugar, until smooth.
Pour batter over pears. Bake until slightly golden and firm to touch, about 40 to 45 minutes. Allow to cool slightly, then dust with powdered sugar. Serve warm or at room temperature, with whipped cream if desired.
I am not a health professional and nutrition data is calculated programatically. Accuracy may vary with product selection, calculator accuracy, etc. Consult a professional for the best information.