Roast the poblano and jalapeno peppers at 425°F until the skin is blistered, approximately 25 minutes for poblanos and 15 minutes for jalapenos.
Let cool, then peel and chop them.
In a medium-sized pot, melt the butter over medium heat.
Sauté the garlic and white onion until fragrant and soft, for about 4 minutes.
Add the roasted chiles to the pot, stirring with the onions and garlic to meld their flavors.
This combination lays the groundwork for a robust queso.
Gradually incorporate the cheeses—Monterey Jack, mozzarella, and goat cheese—stirring constantly until fully melted and smooth.
Make sure each cheese blends well for that perfect texture.
Season with salt and pepper to your taste.
Serve warm with tortilla chips or over your favorite dish to savor the blend.