In this case, the salt of soy, the richness of butter, the sharpness of five-spice powder and the brightness of lime are waiting for them. This is a flavorful little dish that could easily be paired with chicken, pork or salmon.
Arrange the onions in a single layer in a large ovenproof skillet and add the olive oil, soy sauce, five-spice powder, and 1 cup water. Add the butter and simmer gently over medium heat, stirring from time to time, until the onions are tender when pierced with the tip of a knife, 10-15 minutes.
Broil the onions:
Put the skillet under the broiler and broil until the onions brown further on the top, 2-3 minutes. Sprinkle the lime zest and juice over the onions. Serve immediately.