Judy'S Delicious Spinach - cooking recipe

Ingredients

3 (10 oz.) pkg. frozen chopped spinach
4 Tbsp. butter or margarine
3 Tbsp. flour
1 c. milk
1 tsp. fancy mustard
1/4 to 1/2 c. grated white cheese (Muenster, Havarti, Cheddar, Brick or Swiss)
1/4 to 1/2 c. Parmesan cheese

Preparation

Cook spinach in small amount of boiling salted water; drain thoroughly.
Preheat oven to 350\u00b0.
Melt butter in medium, flameproof baking dish.
Turn off heat and stir in flour into butter until it forms a roux.
Turn heat onto low flame; add milk gradually, stirring continually until sauce thickens.
Add more milk if necessary.
Add mustard, grated white cheese and Parmesan slowly, stirring continually until smooth.
Add spinach; mix thoroughly.
Sprinkle
top with more Parmesan cheese.
Bake uncovered for 20 minutes.