Bring a medium pot of salted water to a boil and cook the chickpea pasta according to package directions until al dente.
While pasta cooks, heat the olive oil in a large skillet over medium-high heat.
Add the ground turkey sausage to the skillet, breaking it up with a wooden spoon, and cook until browned and caramelized.
Add the diced yellow onion and sliced zucchini to the skillet with the sausage, sautéing for 5-7 minutes until the vegetables are tender and slightly charred.
Stir in the minced garlic, red pepper flakes, sea salt, and black pepper, cooking for an additional 60 seconds until fragrant.
Drain the pasta, reserving 2 tablespoons of the pasta water.
Add the cooked pasta, reserved water, and lemon juice to the skillet, tossing everything together over medium heat for 1 minute to emulsify the sauce.
Serve immediately while hot, garnished with extra lemon zest if desired.