Whisk together cream, maple syrup, sugar, lemon juice, and vanilla in a small bowl. Pare, halve, and core pears. Place pears, cut side down, on work surface. Slice thickly widthwise without cutting all the way through.
Place, cut side down, in spoke-fashion in 9-inch round quiche dish or 10-inch pie plate. Pour cream mixture over.
Bake, uncovered, in preheated oven for 35 to 40 minutes or until liquid is bubbly and pears are tender. Servewarm.