This one might be even easier than the cucumber and shrimp dish.
In a large skillet, heat up 1 tbs. oil and 1 tsp minced garlic. When the oil is hot, add as much spinach as you can fit in the skillet, and 1 cup water. Cover and steam until limp, about 2 minutes.
Scoop the spinach into a serving dish, draining off the water, and top with 2 tsp oyster sauce and 1 tsp. sugar. Serve warm.