Preheat oven to 350 degrees. Place bacon in an oven-proof skillet or Dutch oven and cook over medium-high heat until the bacon is well cooked and crispy, about 5 minutes.
Add the sausages to the skillet and sear for 3 to 4 minutes on both sides. When the sausages have good color, turn off the stove and remove them from the skillet.
With the pan off the burner add the sliced onions and garlic to the bottom of the skillet. Season with half of the sea salt, black pepper, thyme and parsley.