Grease a large glass or steel mixing bowl with butter or oil. Heat the water until it reaches 98-105 °F (36-40°C). (Don't overheat the water as it will kill the yeast.)
Make The Dough: In the bowl of the stand mixer , add the gluten-free flour, sugar, yeast. Attach the dough hook and turn the mixer to low speed. Gradually add the lukewarm water while mixing, beat until the flour is combined. (Scrape the bowl sides as needed to ensure the consistency of the dough.) Add lemon juice, then olive oil and mix until incorporated. Finally, mix in salt. It won't take more than 5-6 minutes for the dough to form and become smooth. If you don't have a stand mixer you can use a mixing bowl with a spatula or wooden spoon. *The dough is sticky and looks like a batter at the end of this step, that's okay! as there's no gluten in it.*
1st Rise: Transfer the dough to the prepared greased bowl with a bowl scraper or spatula. Cover with a clean towel or plastic wrap and let rise for 60-90 minutes or until doubled in size.
Grease or line a baking pan with parchment paper.
Shaping: When the dough is doubled in size, flour your hands and work surface with gluten-free flour. Turn the dough out onto the floured surface and gently press to release air. Shape into a ball. (A bowl scraper is always useful when working with gluten-free bread dough.) *Gluten-free dough is tricky to shape by hand, so don't panic if the dough doesn't form the first time, just sprinkle the dough with flour and try again to shape it.*
Gently, roll out the dough ball into a rectangle, about 8×15 inches (25x15cm). It doesn't have to be perfect and it may be rounded on the edges, that's okay! Roll it up into a 6-inch log and place in the prepared loaf pan. See the picture above as a guide for shaping. Lightly flatten the top to assure a perfect shape. Fill a sieve with a small amount of flour and sprinkle the flour over the loaf of bread.
Score: Score the top of the bread with 6 slashes using a cutter, sharp knife or bread knife.
2nd Rise: Cover the shaped loaf. Allow to rise for 1 hour or until doubled in size.
Place a small steel bowl at the bottom of the oven. Preheat the oven to 445°F (230°C).
Bake: Spray your gluten free loaf with water. Place the baking pan at lower-middle positions, fill the prepared steel bowl with 1 cup of water and bake for 25-30 minutes or until golden brown and the bottom of bread sounds hollow when tapped.
Let the bread cool in the pan for 10 minutes before serving.