Eggplant Casserole
["1 large eggplant*", "1 medium onion", "saltine crackers", "4 Tbsp. margarine", "4 Tbsp. flour", "1 tsp. salt", "1/2 tsp. pepper", "2 c. milk"]
["*Zucchini or summer squash may be substituted for eggplant."]
["eggplant", "onion", "crackers", "margarine", "flour", "salt", "pepper", "milk"]