Line a shallow pan (that the connected buns will fit into) with parchment paper, as this is also the pan you will be using to cook the egg mixture. Place connected buns onto a shallow pan for baking.
Combine the sausage, onion, garlic, salt, pepper, and red pepper in a frying pan and saute until softened, approximately 4 – 5 minutes.
Add the spinach and saute until it’s wilted. Set aside to cool slightly.
Once cooled, transfer to a bowl and add the 6 eggs. Mix thoroughly.
Pour into the lined baking pan.
Bake for approximately 15 minutes or until the egg is fully cooked and solid.
Remove from the pan by grabbing the sides of the parchment paper to cool slightly.
Meanwhile, with a long serrated bread knife, cut the tray buns in half horizontally.
Place the bottom portion of the buns in the baking pan and spread with the mustard.
Carefully remove the parchment from the egg mixture and place on top of the bottom tray bun portion.
Sprinkle with the grated cheese.
Cover the cheese with the top of the tray bun portion.
In a small bowl, combine the melted butter, garlic, and parsley.
Brush the tops of the buns with the butter mixture.
Bake in the oven for approximately 8 – 10 minutes, or until the tops are golden brown and the cheese has melted.
Remove from the oven, let cool slightly, and cut into pieces to enjoy!
Notes
No extra butter is used for sauteing as the fat in the sausage should be enough.Other sausage works well just brown it with the veggies