Preheat oven to 400° Fahrenheit and line one large or two medium-sized sheet pans with parchment paper.
Prep veggies and sausage as noted, and place veggies in a large mixing bowl. Add melted ghee or avocado oil, rosemary and sea salt. Toss to coat. Then, spread out on sheet pans(s) in an even layer and add sausage to pan. Place in the oven to roast for 30-40 minutes, until squash is tender.
While sausage and veggies are roasting, make ranch dressing. Place all of the dressing ingredients in a bowl or jar and whisk until creamy. Refrigerate until you serve.
Also, while the sausage and veggies roast, prep greens and avocado.
Once squash is tender, remove sausage and veggies from oven and make bowls. Start with a bed of greens and layer on sausage and veggie mixture. Top with ranch and avocado. Enjoy!