Preheat oven to 425 degrees F.
In a medium mixing bowl, make the almond Frangipane by beating the softened butter and sugar together on medium with a electric mixer until smooth. Add the egg, almond flour, almond extract, and vanilla extract. Beat together until fully combined. Set aside to make the muffin batter.
Combine the flour, baking soda, baking powder, and salt together in a medium bowl. Mix and set aside.
In a large mixing bowl, add the bananas, eggs, oil, Greek yogurt, honey, almond extract and vanilla extract. Whisk together until smooth. Stir in the dry ingredients and mix until just combined.
Divide half of the muffin batter into 12 muffin tins with muffin liners. Place a dollop of almond Frangipane, roughly a tablespoon size, onto the muffin batter. Top with the remaining muffin batter. Sprinkle on some almond slices. Bake for 5 minutes at 425 degrees, then reduce heat to 375 degrees for 13-17 minutes more or until the batter is set. Let cool slightly and enjoy!