One theory on making a Lambic Mead:
Honey has tons of wild microorganisms in it naturally, unless you kill them by boiling.
But as stated, they won't do much in a straight mead. Grain carbs/protiens will help them sour the beverage (I know from experience...).
If you are shooting for a higher ABV (guessing upwards of 9-10%) you will also want to give the fermentation time to sour, before the wild stuff gets killed off by the high alcohol content.
Therefore, I would intentionally not areate the wort, not put any yeast nutrient in, and possibly pitch the yeast at a lower rate. Here would be my process:
Heat the water up to ~160
Steep some grains with the wort. Clarify if you have a mash/later tun, unless you prefer it to have protien haze. Either way, the important part is to have some grain stuff for the wild organisms.
After seperating the wort from the grain, add the honey. If you want to add spices/herbs/flavors to the mead, you should boil the wort with the spices first, then add the honey as it is cooling down.
Pitch yeast when the wort gets to temperature. DON'T add yeast nutrient, and DON'T areate the wort. The goal is to have a long, slow fermentation.
Hopefully, the wild organisms will sour the beverage, slowly as it ferments. When it starts reaching a higher ABV, the beverage will start to stabailze (hopefully) and keep it from getting too sour. Of coure, on the flip side, it could get too sour too early, and the alcohol could simply be displaced by lactic acid, killing off the yeast from too low pH. I don't know. It might be a careful balancing act. As long as the yeast are the dominant culture, and the lactic culture is secondary, things should be OK.
Re-rack it. Let it settle. Let it finish fermenting. Keep re-racking if neccessary. Have patience. Let it age. FORGET ABOUT THE DAMN THING for a while.
Bottle it. Age it some more.
etc...
It can't hurt to taste along the way, but don't get too gung ho. You've got to let it age out and see how it behaves.
Just my thoughts. Most meads I've made have fermented too fast and too strong for any labmic type stuff. Beers are a different story. Adding raw honey will spoil them pretty quickly. Again, speaking from experience here... but I've never tried this recipe. Maybe I should.