Meaty Stuffed Pizza

Name: Meaty Stuffed Pizza
Ingredients: 2 (6.5-ounce) packages pizza crust mix (recommended: Betty Crocker); 2 teaspoons Italian seasoning (recommended: McCormick's); 1 cup hot water; 1 tablespoon oil; 1/2 pound lean ground beef; 1/2 pound hot Italian sausage, casings removed; 1 (2.5-ounce) jar sliced mushrooms, drained (recommended: Green Giant); 1 (2.25-ounce) can sliced black olives, drained (recommended: Early California); 2 1/2 cups marinara sauce, divided (recommended: Prego); 2 cups shredded mozzarella cheese (recommended: Kraft)