Chicago-style Deep-dish Spinach Pizza

Ingredients

• bulk Italian sausage
  ¾ pound
• chopped onion
  1 cup
• x 8-ounce can pizza sauce
  1 unit
• x 4-ounce can sliced mushrooms

  drained
  1 unit
• x 3-ounce package sliced pepperoni
  1 unit
• snipped fresh basil or 2 teaspoons dried basil

  crushed
  2 tablespoons
• snipped fresh oregano or 1 teaspoon dried oregano

  crushed
  1 tablespoon
• crushed red pepper
  ¼ teaspoon
• x 16-ounce loaf frozen whole-wheat bread dough or white bread dough

  thawed
  1 unit
• shredded mozzarella cheese (6 ounces)
  1½ cups
• x 10-ounce package frozen chopped spinach

  thawed and well drained
  1 unit
• slightly beaten egg
  1 unit
• margarine or butter

  melted
  1 tablespoon
• grated Parmesan cheese or Romano cheese
  2 tablespoons