Top This: The Village Deep Dish Pie (à la Union Pizza Company)
Union Pizza Company's The Village deep dish pizza is loaded with pepperoni, Italian sausage, smoked ham, sautéed mushrooms, thick sauce, and a pound of cheese. Owner Bruce Markoe pays special attention to the meats, with a technique that ensures his pie stays crisp and light. Well, as light at a five pound pool of pizza can hope to be.,, More

@BGEPizza - Union Pizza Company is super committed to fresh, "all natural" products and nitrite-free meats. I was actually really impressed with the quality of ingredients in the kitchen—including the fresh mushrooms. They are sautéed before going into the pizza. They might look canned, but I assure you, they are not :)
Their website states most of their suppliers and topping prep here.
@Glutenboy - Top This posts are not really reviews... it would take another 700 words to offer a valid verdict.
But... while this The Village is not my personal cup of tea, The Classic—Spinach, Roasted Garlic and Mushroom—is totally my morning latte! It's filled with the most generous portion of spinach I've ever encountered in a deep dish pizza. Union Pizza Company takes care to keep their pies light on the grease and salt (as stated here) but I'm youngish so I salt my slices. In all their pies, the ratio of crust to topping leans heavily toward the topping... a fact I'm personally fond of.