Spinach Bars - cooking recipe

Ingredients

4 Tbsp. butter
3 eggs
1 c. flour
1 c. milk
1 tsp. salt
1 tsp. baking soda
1 lb. Cheddar cheese, grated
1 (10 oz.) pkg. chopped spinach, thawed and dried
1 small onion

Preparation

In a 9 x 13-inch pan, melt butter.
Mix remaining ingredients and spoon into a pan.
Bake at 350\u00b0 for 35 minutes.
Cool slightly before cutting.
Serve hot or at room temperature.