Spinach and Mushroom Pie

• 1 tbsp extra virgin olive oil
• 300 g white cup mushrooms, finely diced
• 200 g baby spinach
• 5 eggs
• 325 g ricotta
• 1 tbsp lemon (zest)
• 2 green onions, thinly sliced
• 4 sheets filo pastry
• 400 g heirloom tomatoes
• .25 cup basil, shredded
• 2 tbsp white wine vinegar
• 1 tbsp garlic
• 2 tbsp extra virgin olive oil