Pepperoni Pizza Spring Rolls

Name: Pepperoni Pizza Spring Rolls
Ingredients: 1/4 c. extra-virgin olive oil; 1/2 onion, finely chopped; 4 cloves garlic, thinly sliced; 1 (28-oz.) can whole tomatoes; 1 tsp. dried oregano; 1/8 tsp. crushed red pepper flakes; 2 sprigs fresh basil; 1 tsp. coarse salt; 1/4 tsp. freshly ground black pepper; 2 c. sliced pepperoni; 1 c. shredded mozzarella; 1/4 tsp. crushed red pepper flakes; 2 tsp. dried Italian seasoning; 1/4 tsp. garlic powder; 2 tbsp. flour; 2 tbsp. water; 15 (8-x-8) square spring roll wrappers; Vegetable oil, for frying