Combine sourdough starter and warm water in a large mixing bowl (or bowl of stand mixer). Allow to dissolve about five minutes. Stir.
Add honey, salt, baking powder, and 2 cups flour. Add flour 1/4 cup at a time until the dough is nice and firm, pulling away from the sides of the bowl. (Mine took about 3 ¼ cups.)
Allow dough to rise for about one hour then ferment in the refrigerator overnight or on the countertop for about 8 hours.
After fermentation place dough on a well floured surface. Roll out in a egg shape by rolling folding the dough into thirds and shaping into a oval loaf. Then roll flat, rolling the bottom thinner than the top to make it an egg shape surface. See Picture.
Cut five strips at an upwards angle using a pizza cutter or bench scraper. Giving you four "branches", a topper, and a triangular shape at the bottom.
Apply pesto and parmesan cheese everywhere then cut the branches in halves (red lines in the previous picture indicate where you should cut into halves).
Shape the topper. Twist the two pieces you divided to form one individual branch. Fold the triangle at he bottom into thirds to form a stem. SEE NOTE.
Allow to rise 30 minutes.
Bake at 350℉ for 15-20 minutes or until golden brown. Serve with marinara sauce for best results.
Notes
For more detailed info on shaping your tree go check out the blog post section about shaping.