Joyfulhealthyeats.com
Prep the mixture
Preheat the oven to 350F. Whisk the eggs, milk, and Dijon in a large bowl until smooth. Set it aside.
Brown the sausage
Place a skillet (oven-safe) over medium-high heat. Add the sausage and cook it until browned. Remove it from the heat and set it aside.
Cook the potatoes
Add the potatoes to the same skillet and cook until lightly browned and tender. Don’t over-cook them because they’ll lose their texture.
Combine everything
Return the sausages to the skillet. Mix in the spinach and cook for another 5 minutes or until wilted.
Add the eggs
Pour in the prepared egg mixture. Cover the potato mixture evenly. Let it cook for about 4 minutes without any stirring.
Bake it
Top it with parmesan cheese and carefully transfer the skillet into the oven. Bake until it has set.
Remove it from the oven and serve immediately.