Zucchini Pizza Boats

Preheat oven to 350 degrees F. Cut each zucchini in half lengthwise and, using a teaspoon, remove most of the flesh, leaving 1/2-inch-thick shells. Coarsely chop half of the flesh; discard the remaining flesh or reserve it for another use. Place the zucchini shells on a baking sheet and sprinkle with pepper. Bake until just tender, 8 to 10 minutes.

Meanwhile, heat oil in a medium skillet over medium-high heat. Add the chopped zucchini, onion and garlic; cook until the onion starts to soften, 3 to 4 minutes. Stir in tomatoes and marinara sauce; cook, stirring occasionally, until the liquid evaporates, about 2 more minutes. Divide the zucchini mixture evenly among the zucchini shells. Top evenly with ricotta, pepperoni and olives. Sprinkle with Parmesan and mozzarella.

Switch oven to broil and place a rack 8 inches from the heat. Broil the zucchini boats until the cheese is browned, about 5 minutes. Top with basil and crushed red pepper.