Ingredients Original recipe yields 12 servings Ingredient Checklist 2 cups chopped fresh spinach 1 sweet onion, chopped 4 eggs 2 cups milk 1 cup baking mix (such as Bisquick ®) 1 cup chopped ham 2 cups shredded Cheddar cheese 1 tomato, thickly sliced (Optional) Directions Instructions Checklist Step 1 Preheat an oven to 325 degrees F (165 degrees C). Coat the bottom of a 9×13 inch pan with cooking spray. Step 2 Combine spinach and onion in the bowl of a food processor. Process to finely chop. Add eggs, milk, and baking mix; process to mix. Pour mixture into prepared pan. Sprinkle ham and cheese over the top. Step 3 Bake in preheated oven for 35 to 45 minutes. Quiche is done when toothpick inserted in the center comes out clean. Garnish with tomato slices to serve.