Here are the foods from our food nutrition database that were used for the nutrition calculations of this recipe. Calories per serving of Oven Roasted Asparagus. 39 calories of Olive Oil, (0.33 tbsp) 14 calories of Asparagus, fresh, (5 spear, small (5" long or less)) 1 calories of Pepper, black, (0.17 tsp) 1 calories of Thyme, ground, (0.17 tsp)