Start by preheating your oven to 425°F and lining a large baking sheet with parchment paper. I always do this first so the oven is fully heated by the time my ingredients are ready. A properly hot oven is what gives the sweet potatoes those crispy, caramelized edges I love so much.
While the oven heats, slice the chicken sausage into rounds and cube your sweet potatoes into even, bite-sized pieces. Halve the brussels sprouts and cut the red onion into wedges. I try to keep everything a similar size so it all finishes roasting at the same time without any burnt or undercooked bits.
In a small bowl, whisk together the honey, soy sauce, minced garlic, olive oil, smoked paprika, salt, and pepper. I like to whisk it until it looks glossy and well combined, since that's when I know the flavors have actually blended together. This sauce is really what makes the whole dish taste special.
Add the sausage, sweet potatoes, brussels sprouts, and onion to a large bowl, then pour the honey garlic sauce over top. Toss everything until each piece is coated evenly. I usually use my hands for this step because it coats the vegetables more thoroughly than a spoon ever does.
Spread the coated mixture out onto your prepared baking sheet in a single, even layer. Try not to overcrowd the pan, since packing everything too close together traps steam and keeps the vegetables from browning properly. If needed, I split mine across two pans instead of forcing it onto one.
Slide the pan into the oven and roast for about 25 to 30 minutes, giving everything a stir halfway through. I know it's ready when the sweet potatoes are fork-tender and the edges of the sausage and brussels sprouts look nicely caramelized. Your kitchen will smell amazing by this point.
Once out of the oven, let the pan rest for a couple of minutes before serving. I like to sprinkle fresh parsley over the top right before bringing it to the table. This little pause also lets the glaze set slightly so it clings to every bite.