Chop up your broccoli into bite-sized florets. Trim the tough parts off the stem, and cut the soft part of the stem into bite-sized pieces.
Fill a large pot with water, add a generous pinch of salt, and bring to a boil for the noodles.
While the pasta water heats, prepare your steamer – either a double boiler, steaming basket, or a colander set over a pot with a few inches of simmering water.
Once the water for the steamer is boiling, add the broccoli. Cover and steam for 5 - 7 minutes. Check after 5 minutes to see if the broccoli and the stems are tender. Set aside when they are done.
In a skillet over medium-high heat, cook the vegan ground "beef" according to the package instructions. As it begins to brown, add the five spice powder.
Once the pasta water is boiling, add the pasta and cook according to package directions. Before draining, reserve about 1 cup of the pasta water.
While the pasta cooks, whisk together the peanut butter, soy sauce, sesame oil, rice vinegar, sriracha, maple syrup, garlic powder, and ginger powder.
Add the pasta and broccoli to the pan with the vegan ground "beef". Add in the peanut sauce, and use the reserved pasta water to thin out the sauce to your desired consistency.
Divide the noodles among your serving bowls and top with green onions, crushed peanuts, and sesame seeds.