Step-by-Step Instructions:

Step 1: Preheat the Oven

• Preheat your oven to 375°F (190°C) so it's ready to bake the frittata later.

Step 2: Prepare the Ingredients

• Peel and dice 1 cup of butternut squash into small cubes.
• Remove the casings from 1/2 pound (8 ounces) of sausage (turkey or chicken recommended).

Step 3: Cook the Butternut Squash

• Heat 1 tablespoon of olive oil in an oven-safe skillet over medium heat.
• Add the diced butternut squash to the skillet.
• Sauté for about 8-10 minutes, stirring occasionally, until the squash is tender and slightly caramelized on the edges.

Step 4: Cook the Sausage

• Add the sausage to the skillet with the cooked squash.
• Break apart the sausage using a spatula or wooden spoon.
• Cook until the sausage is browned and fully cooked through.

Step 5: Add Vegetables

• Dice 1 small onion and 1 red bell pepper.
• Add the diced onion and bell pepper to the skillet with the sausage and squash.
• Cook for another 5 minutes, stirring occasionally, until the onion becomes translucent and the peppers soften.

Step 6: Wilt the Spinach

• Chop 2 cups of fresh spinach.
• Add the spinach to the skillet with the other ingredients.
• Cook for about 2 minutes, stirring, until the spinach wilts.

Step 7: Prepare the Egg Mixture

• In a mixing bowl, crack 8 large eggs.
• Add 1/4 cup of milk, a pinch of salt, and ground black pepper to taste.
• Whisk the eggs, milk, salt, and pepper together until well combined.

Step 8: Combine Ingredients

• Pour the egg mixture evenly over the cooked sausage and vegetable mixture in the skillet.
• Allow the eggs to settle and cover all the fillings in the skillet.

Step 9: Add Cheese

• Sprinkle 1/2 cup of shredded cheese (such as cheddar or mozzarella) evenly over the top of the egg mixture in the skillet.

Step 10: Bake the Frittata

• Carefully transfer the oven-safe skillet to the preheated oven.
• Bake for 15-20 minutes, or until the eggs are fully set and the top is lightly golden brown.

Step 11: Serve

• Using oven mitts, remove the skillet from the oven and allow the frittata to cool slightly.
• Optionally, garnish with fresh herbs such as parsley or chives.
• Slice the frittata into wedges and serve warm.

Enjoy your flavorful and healthy Butternut Squash and Sausage Frittata!