Heat oven to 400° F. In a large saucepan, combine the quinoa and 1 cup water and bring to a boil. Reduce heat to medium-low, cover, and simmer until the quinoa is tender and the water is absorbed, 12 to 15 minutes.
Meanwhile, cut the zucchini in half lengthwise and scoop out the seeds. Arrange in a large baking dish, cut-side up.
Fluff the quinoa and fold in the beans, tomatoes, almonds, garlic, 1/2 cup of the Parmesan, and 3 tablespoons of the oil.
Spoon the mixture into the zucchini. Top with the remaining tablespoon of oil and 1/4 cup Parmesan. Cover with foil and bake until the zucchini is tender, 25 to 30 minutes. Remove the foil and bake until golden, 8 to 10 minutes.