This recipe works well as an appetizer or impressive side dish. Portobello mushrooms are stuffed with cheese, tomatoes, and fresh herbs, then grilled. We cant knock the classic grilled cheese sandwich that we all grew up with, but sometimes a rainy or sunnywe wont discriminate day calls for something more. Brush the portobello mushrooms with 3 tablespoons of the olive oil and season with salt and pepper. Grill or broil the mushrooms over high heat, turning, until softened, 1. Transfer to a plate, stem side down let drain and cool. Meanwhile, in a medium skillet, heat the remaining 1 teaspoon of olive oil. Add the onion and cook over moderate heat until softened, about 6 minutes. Add the baby spinach and cook until wilted, about 1 minute. Transfer the spinach to a sieve and press out the liquid. Glazed Carrots Crock Pot. In a bowl, mix the spinach with the rice, cheese, cilantro and poblanos. Season with salt and pepper. Preheat the oven to 3. Season the mushroom caps with salt and pepper. Spoon the rice mixture into the mushrooms, mounding it slightly. Transfer the mushrooms to a baking dish and bake for about 2. Serve warm or at room temperature.