Halakhah sobre Chalá 3:14

From the laws of the commandment is that which they, may their memory be blessed, said (Mishnah Challah 3:1) that the obligation begins not from the time that the dough is placed into the trough, but from the time of rolling; that is to say that the obligation begins from the time that the water and flour are mixed. And the five types of grain that are obligated in challah are wheat, barley, spelt, oats, and rye; as it is stated (Numbers 15:19), "And it shall be when you eat from the bread of the land" - and only loaves made from these are called bread. And they all combine to [constitute] the measurement [of what requires the separation] of challah. And if one did not separate challah from the dough, he may separate it from the bread; as it says, "when you eat from the bread," which teaches that bread is also obligated. Even if one first kneaded a quantity that was insufficient [to be obligated] in challah, if he then kneaded another batch and mixed the whole loaf into one vessel that has an interior, such that the two combine to the requisite measurement, the vessel combines them [to be obligated in] challah. I heard from my teacher, may God protect him, that this is only if the bread was taken from the oven and put into a vessel that has an interior, but if it was placed on a board or on the floor, or anything else that has no interior, even though they were subsequently placed into a basket, they are already exempt from challah. This is what they meant when they said, "one who removes it into a basket;" it is only if it went from the oven to the basket at the time of [their] removal. And there is no need to say that the oven does not serve to combine [to obligate in] challah (Mishneh Torah, Laws of First Fruits and other Gifts to Priests Outside the Sanctuary 6:16). The bran that is in the dough is counted toward the requisite measurement before it is sifted; but if it is mixed back in after it is sifted, it does not count towards the requisite measurement (see Mishnah Challah 4:6).