Preheat oven to 350° F.
Melt butter in a large skillet over medium-high heat. When foam subsides, sauté onion, green bell pepper and garlic until tender, about 4 minutes. Stir in spinach (well drained, excess moisture squeezed out) and sauté 2 more minutes; set aside.
In a large mixing bowl, beat eggs, evaporated milk, milk, basil, salt and pepper until well combined. Stir in spinach mixture, Swiss Cheese, 1/2 cup Parmesan cheese and pine nuts.
Divide evenly between pie crusts. Sprinkle tops with remaining Parmesan.
Bake for 40 to 45 minutes, or until centers are just set.Servings: 2 - 9 inch pies or 12