Preheat oven to 450 degrees. Spray baking sheet with nonstick cooking spray.
Wash the peppers. Slice them length wise in half and remove the seeds and white membranes. Set aside.
Remove casings from sausage and mix with cheese, until thoroughly combined. Fill peppers with approximately 1 heaping tablespoon of sausage mixture. The bigger the pepper, the more filling you will use. Secure the pepper with a toothpick pierced through the middle if necessary for the jalapeño to hold its form. Season to taste with salt and pepper.
Place peppers on the prepared baking sheet and bake for 15-20 minutes. Transfer to serving platter and enjoy!
Notes
We made these with chicken sausage but you can make them vegetarian by replacing the sausage with beans!