Savory Herb Tomato Pie

Ingredients

• 1 unbaked pie crust
• 1 medium sweet onion, cut into rings
• 1 Tbsp. vegetable oil
• 1 ½ lbs. roma tomatoes, cut into ¼ inch thick slices

• 1 Tbsp. coarse ground The Spice Hunter Salt Free Mediterranean Herb Organic Grinder

• 1/3 cup shredded mozzarella cheese
• 1/3 cup grated parmesan cheese

• ¾ cup mayonnaise