01 - Preheat oven to 400°F. Line a baking sheet with parchment paper for easy cleanup.
02 - Wash zucchinis thoroughly, trim the ends, and slice each lengthwise. With a spoon, scoop out seeds and some flesh to create a 1/4-inch thick shell.
03 - Brush the interior of each zucchini boat with olive oil and season lightly with salt, black pepper, and dried Italian herbs.
04 - Place prepared zucchini boats cut side up on the lined baking sheet.
05 - Spoon marinara sauce evenly into each zucchini shell.
06 - Sprinkle shredded mozzarella and grated Parmesan over the sauce-filled zucchini.
07 - Distribute mini pepperoni, sliced black olives, diced red bell pepper, and chopped basil over the cheese layer.
08 - Transfer baking sheet to oven and bake for 20 to 25 minutes until zucchini is fork-tender and cheese is bubbling and lightly golden.
09 - Remove from oven, garnish with additional fresh basil, and serve hot.