How to Make It
Cut ends off zucchini, and cut each in half crosswise. Using an apple corer, remove the center of each zucchini piece, and stuff each with 1 mozzarella log. Cut stuffed zucchini crosswise into 1/2-inch-thick rounds.
Place flour in a shallow dish. Place eggs in a second shallow dish, and breadcrumbs in a third shallow dish. Dredge each stuffed zucchini round in flour, and dip in egg, shaking off excess. Dip in breadcrumbs, pressing to adhere.
Heat oil in small saucepan over medium-high. Fry coated zucchini rounds 3 at a time, turning occasionally with a fork, until golden brown, about 3 minutes. Transfer fried zucchini rounds to a plate lined with paper towels to drain; sprinkle with salt. Serve with marinara sauce.