Heat up a pan with the oil over medium-high heat, add sausage slices, stir, cook for 3 minutes on each side, transfer to a plate and leave aside for now.
Heat up the pan again over medium heat, add onion, yellow and orange bell peppers and tomatoes, stir and cook for 5 minutes.
Add pepper flakes, salt, and pepper, stir well, cook for 1 minute and take off heat.
Arrange sausage slices into a baking dish, add bell peppers mix on top, add parsley and gouda as well, introduce in the oven at 350 degrees F and bake for 15 minutes.
Divide between plates and serve hot.
Enjoy!
** Nutrition per serving: 4 servings, Each has Calories 200, Fat 5g, Protein 14g, Carbs 6g