Preheat oven to 425°F. Place a rack at lowest level and one below the broiler coil. Place florets on a rimmed baking sheet, drizzle with oil. Sprinkle with salt. To maximize browning, rub florets in oil and place cut sides of florets flat against the pan. Bake for 8-10 minutes or until you see browning on the underside of the florets.
Move baking sheet to higher rack to develop some flavorful browning on top (about 8 minutes) or until the cauliflower reaches your preferred level of tenderness.
While the cauliflower cooks, prepare homemade béchamel or warm a pre-made béchamel. Add half the muenster cheese to warm béchamel to make it a mornay sauce, stir until melted. Transfer finished cauliflower to baking dish, pour mornay sauce evenly over cauliflower. Sprinkle on remaining cheese. Turn on broiler and place cauliflower under it for 2-4 minutes.
Recipe reprinted with permission © 2021 Michele Redmond / The Taste Workshop