Begin by mixing 2 tbsp of instant yeast with the warm water in a large bowl.
Gradually mix in 6 1/4 cups of all-purpose flour, sugar, salt, olive oil, and tallow into the yeast mixture.
Once a shaggy dough forms, turn it out onto a lightly floured surface. Knead until you have a very smooth dough ball.
Place the dough back in the mixing bowl, cover it with plastic wrap or a clean tea towel, and let it rise in a warm place for about 15 minutes.
After the dough has risen, divide it in half and shape each half into a loaf.
Place each loaf into a standard-sized greased loaf pan.
Optionally, drizzle the loaves with olive oil or brush them with an egg wash for a golden-brown crust.
With a sharp knife or razor, make a slit about a quarter-inch deep down the center of each loaf.
Place the loaf pans in an unheated oven with a pan of water underneath.
Heat the oven to 400 degrees and bake for 35 minutes, or until the top of the pan reaches a golden brown color.
Remove the bread from the oven and let it cool on a cooling rack for at least 10-15 minutes before slicing.
Once completely cooled, store the bread in an airtight container or plastic bag at room temperature for up to 3-4 days. For later use, you can slice the bread and freeze it in a freezer-safe bag.