3 tablespoons unsalted butter
2 cups whole milk
2 tablespoons flour
1 cup coarsely grated Monterey Jack
1 cup coarsely grated sharp white Cheddar
1/2 cup grated Parmigiano-Reggiano
Salt and freshly ground black pepper
1 large head cauliflower, cut into florets
2 poblano chiles, roasted, peeled, seeded and finely diced
4 ounces goat cheese, cut into small pieces