6 tablespoons butter
6 tablespoons all purpose flour
2 cups half and half
¾ cup shredded sharp Cheddar cheese
¾ cup shredded Monterey Jack cheese
½ cup shredded Parmesan cheese
½ teaspoon salt, or to taste
Pinch ground black pepper, or to taste
Several dashes hot sauce, to taste
3 cups cooked shrimp, chopped
3 scallions, white and green parts, thinly sliced
¾ cup panko bread crumbs
3 tablespoons butter, melted
Preheat oven to 350 degrees.
Over medium-low heat, melt butter. Add flour and cook, stirring constantly for one minute. Whisk in half and half until smooth and thick.
In small bowl, mix together the cheeses, reserve ¾ cup to use for topping. Add cheese to half and half mixture and stir until melted. Add salt, pepper and hot sauce, taste and adjust seasoning.
Remove from heat, stir in shrimp and scallions until well blended. Pour mixture into large oven proof baking dish, or 6 individual oven proof baking dishes.
Mix bread crumbs and melted butter until well blended. Sprinkle reserved cheese over top of casseroles or divide evenly over individual dishes. Top with bread crumbs.
Bake for 20 minutes until lightly browned and bubbly.