Set a charcoal chimney full of briquettes to fire - To Roast the Chilies and to Saute the Beef, Onions, Garlic, and Mushrooms
Prepare the Egg Mixture - add the white flour, corn flour (or corn meal), cumin, paprika, salt, and pepper, add the herbs, and eight eggs. Blend very well. Add the one cup of beer and mix in well.
Blister and Roast the Pobalno Chiles over the hot charcoal briquettes.
Add the Roasted Pobalno Chiles to the Sweat Bag and let rest.
Brown one pound of ground beef at a time - store the two pounds of browned ground beef in a container for later.
Saute the Onions and the Garlic - You may need to add a bit of butter or oil to the pot if the pot seems too “dry” to saute the onions, garlic, and the mushrooms.
While the second pound of ground beef is browning, set 24-30 charcoal briquettes to fire. We'll use these briquettes to bake the casserole later after we've put it together.
While you are sauteing, peel the poblano chilies and remove the stems, seeds, and placenta. Some seeds remain.
Once the Onions and the Garlic have cooked at bit, add the Mushrooms and let them Cook in a bit with the Onions and the Garlic.
Return the Browned Ground Beef Back to the Dutch Oven - give everything a good mixing - There is no more mixing after this step - only layering.
Spread (rather sprinkle) the chunks of tomato and sliced olives over the ground beef mixture in the pot.
Spread 1 ½ Cups of shredded Colby Jack Cheese.
Cover the Entire Dish with the Peeled and Prepared Pobalano Chilies
Pour over the Egg/Beer Mixture
Cover the Entire Dish with the Remaining Cheese
Dust the Entire Dish with some Chili Powder
Bake your Casserole for 30-45 Minutes and Until the Dish is Cooked - Turn the pot every 15 minutes and check for doneness after 30 minutes.
Give the dish a peek. Is it done? I will likely be fully set and baked. Give it a test to see. You could use a thermometer. Casseroles with egg and meat should be baked until the internal temperature of your casserole reaches 165°F / 74°C.