You will get better, more consistent results with this recipe if you weigh everything - including the water. However, I have given you volume measurements just in case you haven't yet bought a digital kitchen scale.
Traditional Round Loaf Recipemakes one 1-pound loaf
Mix in the bowl of your stand mixer or whisk together by hand:
225g (about 1 cup) warm water, 110-120 degrees
1 small packet psyllium husk (or half a large packet)*
2 tsp apple cider vinegar
Add to the bowl:
1 package No. 4 Rustic Boule Bread Mix (OR 225g No. 7 Bread Flour, 1 Tbsp sugar, and 1/2 tsp salt)**
1 tsp yeast (about half a packet)
Mix the dry ingredients into the wet ingredients until everything is completely combined and a sticky dough forms.
Remove the dough to a banneton or other lightly floured basket or bowl. Cover, and let rise 1/2 hour in a warm place. After it has risen, turn it out onto a lightly floured surface. Gently knead the dough with lightly floured hands until you can form a ball with it. Place the dough seam-side up back in your rising basket. Let rise 45 minutes to 1 1/2 hours, or until a finger dent doesn't fill in quickly, but only comes halfway back.
When it's done rising, place a dutch oven or a pizza stone and an oven-safe pan in the oven and turn it on to pre-heat to 450 degrees F. While the oven is heating gently shape your dough, trying not to deflate it. Place the dough seam-side down on your lightly floured work surface. Lightly flour your hands. Gently run your hands along the sides of the dough, tucking the sides under and turning the loaf around as you go to get all edges tucked under. The top will be more rounded than before and stretched a bit more tightly. Brush the top with a little water. Place the dough on parchment paper, cover the dough and let rest for 15-20 minutes while the oven heats.
When the oven is ready and the dough has completed its bench rest, score the top with a sharp blade about 1/4 inch deep in whatever pattern you want.
Carefully place the bread in the hot dutch oven or on the hot pizza stone and cover. Cook for 25 minutes, then uncovered on the rack until the crust has a hollow sound when tapped on top. Remove to a cooling rack, or for a crisper crust turn off the flame and cool in the oven with the door propped open. Let the bread cool completely before slicing.
Enjoy some traditional gluten-free bread!
* Small packets come with the No. 4 Boule Bread Mix, and large packets come with the No. 7 Bread Flour.
** sugar and salt are already included in the No. 4 Boule Bread Mix, but not with the No. 7 Bread Flour.