Pepperoni Pizza Rolls

Name: Pepperoni Pizza Rolls
Ingredients: 1 tablespoon olive oil; ⅔ cup finely chopped cremini mushrooms; ½ cup chopped onion; 3 garlic cloves, minced; ½ teaspoon dried Italian seasoning; ¾ cup low-sodium marinara sauce, divided; ½ cup shredded part-skim mozzarella cheese (2 ounces); 1 ounce mini pepperoni slices; 8 (7 inch square) egg roll wrappers; 1 large egg, lightly beaten; Cooking spray; Chopped fresh basil for garnish