swiss vegetable casserole

I LOVE CASSEROLES! So when I found this recipe, I was super excited to try it! 

Ingredients:

2 tablespoons of butter or margerine

2 tablespoons of all-purpose flour

1/4 teaspoon of salt

1/8 teaspoon of pepper

1 1/2 cups of milk

1 cup of shredded swiss cheese

1 bag (1 lb) frozen broccoli, carrots & cauliflower, cooked, drained 

1/4 cup crushed round buttery crackers

Heat oven to 350°F. Spray 1- to 1 1/2-quart casserole with cooking spray. In 2-quart saucepan, melt butter over medium heat. Stir in flour, salt and pepper. Gradually add milk, stirring constantly. Cook and stir until mixture is bubbly and thickened. Remove from heat. Add 3/4 cup of the cheese; stir until melted. Stir in cooked vegetables. Spoon mixture into casserole. Sprinkle with crushed crackers and remaining 1/4 cup cheese. Bake 25 to 30 minutes or until topping is golden brown and casserole is bubbly.