Preheat oven to 425 degrees
Heat a little olive oil in a pan over medium heat
Remove casing from sausage and crumble into pan
Brown sausage for 3-5 minutes
Remove from heat and allow to cool for a few minutes
Slice open side of bell peppers (or cut the top off each pepper.) Spoon sausage into each pepper trying to get a lot of the mixture inside without cracking the pepper.
Arrange peppers on a glass baking dish and place in oven. Cook for 15-20 minutes; peppers should be fork tender. Remove and serve.