Using a mandoline slicer or spiralizer, create your zucchini noodles. I use this one
Heat a large skillet over medium heat using olive oil, and cook meat until done.
Remove meat from pan and set aside. Add additional olive oil to pan and heat zucchini and peppers and onions in pan until tender, approximately 10 minutes. Do not overcook or the zucchini will become mushy.
Drain liquid from vegetables and remove from heat. Add pesto and sausage and mix together in pan. Top with fresh basil, lemon or parmesan cheese, if desired.