For the salad: Using a mandoline, slice the beets paper thin and arrange artfully on a platter. Core the pear and slice into thin lengthwise slices with a knife. Arrange the pears in fans on top of the beets. Add the gorgonzola dolce and garnish with whole mint leaves.
For the dressing: Combine the extra-virgin olive oil and lemon juice in a small bowl. Mince the thyme and the mint leaves together and add to the bowl. Season with salt and pepper. Whisk to combine.
Dress the salad right before serving.