In medium bowl, with wooden spoon, stir together rolled oats, chia seeds, ground flaxseed, hemp hearts, cinnamon, ginger, cloves, and allspice.

In medium bowl, whisk together molasses, vanilla extract, 1 Tbsp maple syrup, and milk. Pour over oat mixture and stir until well combined. Transfer to airtight container and refrigerate for at least 6 hours to overnight. Overnight oats may be made up to 2 days ahead.

When ready to serve, make caramelized pears. In large frying pan, add pear slices and remaining 2 Tbsp maple syrup and bring to a hard simmer over medium-high heat. Let pears cook and caramelize while flipping pears occasionally, about 4 minutes total. Remove frying pan from heat and set aside.

If desired, thin out overnight oats with additional milk to desired consistency. Divide among serving bowls and top with yogurt, caramelized pear slices, and a sprinkle of toasted hazelnuts.