Bring eggs to room temperature if you haven't already. Preheat oven to 350 degrees. Line a 12-cup muffin pan with liners and grease liners with coconut oil spray.
Begin by whisk together all wet ingredients in a medium bowl.
In a large bowl, whisk together all dry ingredients except for pears and blueberries. When dry mixture is incorporated and smooth, fold in pears and blueberries to coat in the dry mixture.
Add wet mixture to the dry mixture, folding with a spatula delicately until all ingredients are well combined.
With an ice cream or large scoop, evenly distribute batter in muffin liners, about 3/4 high up each liner. Top each muffin with a few blueberries.
Bake on the middle rack for 20-25 min, rotating pan 180 degrees halfway through cooking, until muffins are golden and just cooked through. Check muffins with a toothpick to make sure muffins have dry crumbs.
Let cool at least 20 minutes before serving, (muffins need to set a bit). Because these muffins don't contain preservatives, make sure to store in the refrigerator.