While that mixture is cooling, put the water, honey, salt, eggs, and lemon juice into your mixer. (If you don't have lemon juice, you can sub for vinegar. This helps the loaf to last on the counter a bit longer, and softens the loaf as well.)
Mix these ingredients to incorporate. Then add in the paste mixture with butter after it has cooled a bit.
Then, add the remaining flour into the mixing bowl, and mix to combine until no flour is left. Cover, and let this mixture sit for about 15 minutes. This is the autolyse period and it allows the fresh milled flour to absorb the liquid and the bran to soften. Because the yeast is not in the mixture yet, you can do this autolyse period for longer if you prefer.
After the autloyse period, then put in the yeast, and mix to incorporate.
Once the yeast is added, Start the kneading process. Make sure not to knead the dough with the cover on your mixer, this will overheat your dough, and cause it to break down.
Knead until the dough is nice and stretchy. Typically, 6-8 minutes in a Bosch style mixer, 16-20 minutes in an Ankarsrum style mixer, or 25-30 minutes in a Kitchen aid mixer (allow extra time for a Kitchen Aid style mixer to have breaks in between kneading to prevent overheating of the mixer.) These kneading times will vary for everyone, this is just the most common times for these style of mixers.
Once the dough is nice and stretchy, and doesn’t easily tear. Then, cover and allow it to rise until double. This can take somewhere between 1-2 hours. (Instant yeast or warmer rooms will be closer to 1 hour. Active dry yeast or cooler rooms will be closer to 2 hours.)
While the dough is rising, prepare your bread pans with parchment paper, or grease them with softened butter.