Make this recipe a recipe that people in that category can eat. categories: ['low_calorie'], recipe: in a small bowl, combine the garlic, rosemary, olive oil, and vinegar. mix well. using a pastry brush, cover both sides of the portobello mushrooms with the mixture. cover and refrigerate for 30 minutes. preheat the grill or oven broiler. grill the mushrooms on low heat, or place them on a rack that is low in the oven. cook each side of the portobello for 5 minutes. serve immediately.

Target recipe: preheat grill. place mushroom gill side up on a plate. spray lightly with olive oil cooking spray. sprinkle with salt and pepper. place garlic in the stem indentation of the mushroom cap. drizzle balsamic vinegar over mushroom. grill 4-6 inches over medium coals, gill side up, until the edges of the cap down, and mushroom is very dark in color. the cap should be tender yet firm and slightly pliable when picked up. remove from heat. allow cap to cool slightly.