1Heat oven to 375^.
Combine bisquick , ham, onion, eggs, milk, oil, mustard and 3/4 c. of the cheese; mix thoroughly.
2Spoon dough in greased 10-inch pie pan or (9-inch square pan-bake at 400^ for 35-40 minutes).
Sprinkle with remaining cheese and the sesame seed. Pour butter evenly over top. Bake the 10-inch pan 35-40 minutes. Cut into wedges; serve warm.