Review: During our weeklong visit to Barcelona my wife and I ate at Arco Iris twice, and were completely satisfied both times. This is the best lunch spot in Barcelona for clean, tasty, and well-prepared vegetarian or vegan food. The value delivered for 9 euros per person should impress everyone. On our first visit the charming and cheerful owner greeted us warmly in English; on the second, like old friends, as he greets many of the locals who clearly savor eating here. A salad or soup will begin your meal, followed by a second course with dishes including well-seasoned grains like bulgar or rice and perhaps a bit of tofu. Your third course will be the heartiest. On our second visit I had cannelloni stuffed with spinach and pine nuts and covered in a light cream sauce scented with nutmeg, and my wife had a satisfying vegan "bolognese" of eggplant and several other vegetables. Dessert will be a mousse of coffee or chocolate for vegetarians, perhaps a tart; vegans have a choice of freshly cut ripe pineapple or other fruit. We didn't see vegan baked desserts during our visits, so dessert may be the least satisfying course for vegans. There will be at least two choices for each course, and often three or four. Service is pleasant, warm and efficient -- the servers take customers' requests a course at a time, and there is ample opportunity to observe others eating each item to help one decide. The space is charming and sunny, with pretty white and blue tiles and paint colored burnt umber. People eating alone can feel very comfortable here, especially sitting in the open second floor loft with views of the first floor seating area. We saw several people comfortably eating alone and reading next to animated groups of friends. If you enjoy clean, carefully-prepared, unfussy and tasty vegetarian or vegan food in a charming setting I can't imagine a better lunch spot. I wish my hometown was blessed with a restaurant like this.