Preheat the oven to 450°F.

Season the tomato slices with salt, pepper, mashed garlic, and parsley.

In a medium skillet over medium heat, heat the olive oil.

Add the seasoned tomato slices and cook for about 1 minute per side, turning once until they soften and release their juices.

Transfer the tomatoes to a shallow baking dish, arranging them in a single layer.

Deglaze the skillet by adding water and stirring to scrape up any flavorful bits.

Pour this over the tomatoes in the baking dish.

Wipe the skillet and lightly grease it.

Heat over medium heat, then add the sausage slices.

Cook until lightly browned on both sides.

Break the egg(s) into the center of the baking dish among the tomatoes.

Arrange the browned sausage slices around the edges and sprinkle everything with grated Parmesan cheese.

Place the baking dish in the preheated oven and bake for about 6 minutes, or until the egg whites are set but the yolks remain soft.

If using an oven-safe serving dish, serve the baked eggs with sausage and tomato directly from the dish while hot.

Otherwise, transfer to individual plates and serve promptly.