Preheat your oven to 350°F (175°C). This ensures that your squares bake evenly.
Line an 8x8 inch baking dish with parchment paper, allowing some overhang for easy removal later.
In a mixing bowl, beat the room temperature butter and honey together until light and fluffy.
Add the large egg, vanilla extract, and almond extract to the butter mixture. Continue mixing until well combined.
In a separate bowl, whisk together the spelt flour, baking powder, ground cinnamon, and salt.
Stir in the old-fashioned oats and sliced almonds into the dry mixture.
Gradually add the dry ingredients to the wet mixture, stirring just until combined.
Pour half of the batter into the prepared baking dish, spreading it evenly across the bottom.
Spread the fruit jam of your choice over the batter.
Dollop the remaining batter over the jam and use a spatula to spread it out gently.
Bake in the preheated oven for 25-30 minutes or until the top is golden brown and a toothpick inserted into the center comes out clean.
Allow the squares to cool in the pan for about 10 minutes, then lift them out using the parchment overhang. Let them cool completely on a wire rack before slicing into squares.