First, preheat your oven to 350 degrees F. and slice your baguette, then wash and cut the onions, and peppers into strips.
Next, saute the sausage in a skillet over medium heat for 5-7 minutes on each side.
2 Italian sausage
After that, add the onions and peppers to the skillet and cook everything for an additional 7-8 minutes or until the peppers and onions are soft.
1 green bell pepper, 1 red bell pepper, 1 white onion
Now, place the baguette slices on a sheet pan and put them in the oven for 3-5 minutes for the bread to toast, remove them from the oven and set them aside.
¼ baguette
Afterward, layer the sausage, peppers, onions, and mozzarella cheese on the toasted crostinis.
¾ cup mozzarella cheese
Last, place them in the oven to bake for 3-5 minutes or until the cheese has fully melted. Remove the finished appetizer and serve immediately.
Notes
The calories listed are an approximation based on the ingredients and a serving size of two crostinis. Serve the appetizer while it is hot and storage is not recommended as the grease from the sausage will make the bread soggy.