Savory Three Cheese Tart

• 1 ½ oz Parmesan cheese rinds (see Tip)
• 2 - 3 lemon peel strips, thin peel only, no white pith
• 1 garlic clove

Crust

• 7 oz all-purpose flour plus extra to dust
• 4 oz unsalted butter diced, frozen
• ¼ tsp salt
• 3 tbsp ice water

Filling

• 4 oz fresh baby spinach
• 20 oz water
• 3 oz ricotta cheese
• 1 oz feta cheese plus extra to sprinkle
• 2 large eggs
• ⅛ tsp salt to taste