In medium skillet brown ground meat, seasoning to taste. (No need to brown pepperoni). Drain well, set aside.
Lightly grease and dust 12 or 14 inch pizza pan or 10X15 jelly roll pan with flour or corn meal.
Prepare batter by mixing to flour, salt, Italian seasoning, pepper, eggs and milk in a small mixing bowl. Pour batter in pan, tilting pan so batter covers bottom. Arrange topping of meat and onions over batter. Bake on bottom rack in 425 degree oven for 20-25 minutes or until pizza is deep golden brown. Remove from oven; drizzle with pizza sauce and sprinkle with cheese. Top with mushrooms or other toppings.
Return to oven for 10-15 minutes til cheese is melted and sauce is bubbly.