Spinach Pie with Pancetta

Ingredients (9)

• + 3 tablespoons extra-virgin olive oil add to pantry
• + ½ large red onion, diced add to pantry
• + 2 cloves garlic, minced add to pantry
• + ¼ cup cubed pancetta add to pantry
• + 1 (10 ounce) box frozen chopped spinach - thawed, drained and squeezed dry add to pantry
• + 3 tablespoons feta cheese add to pantry
• + 4 (1 ounce) slices Provolone cheese add to pantry
• + 1 sheet frozen puff pastry, thawed add to pantry
• ✓ 1 egg white