4  Bratwursts

2  Red Bell Peppers , seeded and sliced

1  Large Onions , peeled and thinly sliced

1  Fennel Bulbs , trimmed, cored and thinly sliced

6  Garlic Cloves

2 tbsp  Extra-Virgin Olive Oil

1 tsp  Dried Oregano

0.5 tsp  Crushed Red Pepper Flakes

Salt , to taste

Ground Black Pepper , to taste

Fresh Basil , optional garnish