Preheat the oven to 375°F and lightly grease a baking dish.

Arrange sliced onions in the baking dish and place sausages on top.

Whisk together honey, soy sauce, garlic, olive oil, and black pepper.

Pour the sauce evenly over the sausages and onions.

Bake uncovered for 35–45 minutes, turning and basting halfway through.

Remove from oven when sausages are cooked through and glaze is thickened. Rest briefly before serving.