Spanakopita Squares

Name: Spanakopita Squares
Ingredients: 2 10 oz boxes frozen, chopped spinach, defrosted; 1/9 oz box frozen artichoke hearts, defrosted; 1 cup leeks, cleaned and sliced; 1/2 cup green onions, sliced; 2 teaspoons garlic, finely minced; 3 tablespoons dill, chopped; 8 oz feta cheese, crumbled; 1 cup + 2 tablespoons unsalted butter, melted; 2 tablespoons extra virgin olive oil; 1/2 lb of phyllo sheets; Salt & pepper to taste