1 Head Cauliflower, about 2 pounds before trimming
2 1/2 Tablespoons Butter, plus more for baking dish
3 Tablespoons Fine Bread Crumbs
2 Tablespoons All-Purpose Flour
3/4 Cup Whole Milk
3/4 Cup Chicken Broth
1 Bay Leaf
1 Garlic Clove, peeled and halved
2 Slices Prosciutto
1 Cup Cheddar Cheese, grated
Sea Salt, to taste |