These are really tasty, and the recipe comes from the midwife who helped my first son into the world.
4 tbs. butter, melted
1 c. flour
1 c. milk
1 tsp. pepper
16 oz. sharp cheddar, grated
20 oz. frozen chopped spinach, thawed/drained
1 tbs. chopped onion
Beat eggs. Add flour, milk, and pepper. Mix well. Add everything else.
Spoon evenly into greased 9x13” baking pan, and sprinkle with salt. Bake at 350f for 35 minutes.