In a large mixing bowl, mix the flour and water until it’s a shaggy dough. It’ll feel stiff, but there shouldn’t be any dry pockets of flour in the bowl. Set aside at room temperature for 30 minutes to 1 hour.
Add the instant yeast, salt, onion powder, Italian seasoning, and olive oil. Knead the dough in the bowl for a minute to mix everything together.
Tip the dough onto a clean work surface and knead it by hand for 6-7 minutes (or in a stand mixer with a dough hook attachment for 4-5 minutes) until it’s smooth and elastic. It’ll be pretty oily at first, but the longer you knead it, the more it’ll come together.
Shape the dough into a ball and place it back in the mixing bowl. Cover the bowl with a clean kitchen towel, and let it rise and double in size after about 2-2½ hours in a warm draft-free environment. (I let my dough rise in the oven, turned off, with the oven light on.)
On a lightly floured surface, shape the dough into a round (boule) or oval shape. Create tension on top by gently spreading the top of the dough down the sides & tuck any seams underneath.
Place the dough seam-side-up in a proofing basket or wide bowl lined with a kitchen towel and dusted with a little flour. Set the dough aside at room temperature to proof for 1 hour, or until an indentation made with your finger springs back to its original shape after 2-3 seconds.
Preheat the oven to 450°F. Place a Dutch oven with the lid on inside the oven as it preheats.
Sprinkle a little flour or cornmeal on a large sheet of parchment paper or use a silicone bread baking sling. Gently place the proofed dough seam-side-down on top. Score the top of the dough with three 3-inch-long cuts at a 45 degree angle that are ½-inch deep.
Carefully transfer your scored dough into the hot Dutch oven by lifting the edges of the parchment paper. Bake with the lid on for 30 minutes, then remove the lid and bake for another 10 to 15 minutes until the crust is crispy and golden.
Allow the loaf to cool on a cooling rack for at least 1 hour before slicing. Enjoy!