Preheat your oven to 375°F and lightly grease a small oven-safe baking dish.
Bring a pot of water to a boil and cook the chickpea pasta for 5 minutes, adding the broccoli florets during the final 2 minutes of cooking.
Drain the pasta and broccoli, then set aside.
Season the sirloin steak with sea salt, black pepper, and garlic powder on both sides.
Heat the olive oil in a skillet over medium-high heat and sear the steak for 3-4 minutes per side until browned; remove from heat, let rest for 5 minutes, and slice into bite-sized cubes.
In a large mixing bowl, stir together the Greek yogurt, nutritional yeast, and half of the shredded cheddar cheese until smooth.
Fold the cooked pasta, broccoli, and steak cubes into the yogurt sauce until everything is evenly coated.
Transfer the mixture to the prepared baking dish and sprinkle the remaining cheddar cheese over the top.
Bake for 10-12 minutes until the cheese is melted and the edges are slightly golden.