1.In a frying pan on high, heat oil. Saute onion, garlic and chilli 2-3 minutes, until tender. Add mushrooms. Saute 5-6 minutes, until softened. Remove from heat. Toss spinach through until wilted.
2.To make salsa, mix all ingredients together in a small bowl. Season to taste and set aside.
3.Place 1 tortilla on a work surface. Brush with a little extra oil. Turn over. Spread one-half with one-eighth mushroom mixture, bocconcini, chillies and basil. Fold over. Repeat with remaining ingredients.
4.Heat a large non-stick frying pan on medium. Cook tortillas in batches 1 minute each side, until golden and cheese melts. Cut into wedges. Serve with salsa, extra basil and lime wedges.