Char the Poblano Peppers: Turn the broiler to HIGH and position the oven rack about 7–8 inches from the top of the oven.
Prepare the Peppers for Broiling: Line a baking sheet with foil and arrange the poblano peppers on it.
Broil the First Side: Place the baking sheet under the broiler and cook the peppers for 7–10 minutes, until the skins are blackened and/or blistered.
Turn the Peppers: Use tongs to carefully turn the poblano peppers over, then broil for another 5 minutes, or until the second side is also blackened and/or blistered.
Steam the Peppers: Remove the peppers from the oven, loosely cover them with additional foil, and let them sit for about 10 minutes.
Peel and Dice the Peppers: Using gloved hands or the back of a spoon, peel away the blackened skins, remove the stem ends, and remove as many seeds as desired before dicing the peppers and setting them aside.
Cook the Bacon: Heat a large Dutch oven or stock pot over MED heat, then add the sliced bacon once the pot is hot and cook until the pieces are crispy and brown.
Reserve the Bacon: Remove the cooked bacon with a slotted spoon and place it on a paper towel-lined plate, leaving the rendered bacon drippings in the pot.
Soften the Vegetables: Add 1–2 tablespoons of butter to the bacon drippings, then add the diced onion, red bell pepper, and celery; cook for about 5–8 minutes, stirring occasionally, until the vegetables are softened and slightly golden.
Add the Garlic: Stir in the minced garlic and cook for about 30 seconds, or until fragrant.
Build the Flour Base: Sprinkle the flour over the vegetables and stir thoroughly to combine; cook for 1–2 minutes, stirring often.
Add the Potatoes and Broth: Stir in the diced potatoes, chicken broth, and bay leaf until well combined.
Bring the Chowder to a Boil: Increase the heat to MED HIGH and bring the mixture to a boil.
Simmer the Potatoes: Once boiling, reduce the heat to MED/MED LOW to maintain a heavy simmer, then cook for about 15–17 minutes, until the potatoes are fork tender.
Remove the Bay Leaf: Take out the bay leaf before adding the remaining seasonings and creamy ingredients.
Season the Chowder: Stir in the kosher salt, ground cumin, ground coriander, black pepper, dried Mexican oregano, chili powder, and cayenne pepper.
Add the Creamy Ingredients: Stir in the heavy cream, diced roasted poblano peppers, drained corn, and shredded Mexican blend cheese.
Melt the Cheese: Simmer the chowder for a few minutes, until the cheese has melted and everything is warmed through.
Add the Bacon: Stir about half of the reserved cooked bacon into the chowder, keeping the remaining half for garnish.
Adjust the Seasoning: Taste the chowder and adjust the seasoning if needed.
Garnish and Serve: Ladle the hot chowder into serving bowls and finish with the reserved crumbled bacon, minced cilantro, sliced green onions, lime slices, and a sprinkle of black pepper.