Preheat the oven to 375 degrees F. Lightly coat a muffin tin with cooking spray.
In a large bowl, whisk together the flour, baking soda, salt and cinnamon. In a separate bowl, whisk together the egg, applesauce, maple syrup, peanut butter and yogurt.
Add the applesauce mixture to the flour mixture and stir to combine. Do not overmix.
Divide half of the batter between the muffin cups. Spoon 1 teaspoon jam into the middle of the batter in each muffin cup. Scoop the rest of the batter over top of the jam, using a small spatula or your fingers to spread the batter so that it covers the jam.
Bake until a toothpick inserted in the center of one of the muffins comes out clean of batter (it may have a little jam on it), 12 to 15 minutes.
Remove the muffins from the pan and allow to cool. Serve or store in an airtight container.