In a skillet over medium heat, sauté onion and green pepper in oil. Remove to a medium bowl and set aside. Brown sausage in skillet; drain and combine with onion mixture. Add spinach, cheeses and garlic powder; mix well. Top each egg roll wrapper with 3 tablespoons of mixture; roll up, following directions on egg roll package. Heat 3 to 4 inches oil in a deep fryer. Add egg rolls a few at a time, frying until golden. Drain on paper towels. Serve warm with pizza sauce for dipping.