Savory Sausage and Potato Medley

Ingredients

• 1 small onion, diced
• 2 tablespoons unsalted butter
• 2 tablespoons olive oil
• 1/4 cup grated parmesan cheese (optional)
• 1/4 teaspoon black pepper
• 1/2 teaspoon seasoned salt
• 1/2 teaspoon Italian seasoning
• 1/2 red bell pepper, diced
• 1 1/2 lbs Yukon gold potatoes, diced into 1/2-inch cubes
• 1 lb smoked sausage, sliced
• 1/2 green bell pepper, diced