01 - Preheat the oven to 350°F (180°C). Grease a standard 12-cup muffin tin or line with silicone muffin liners.
02 - In a skillet set over medium heat, brown the sausage for approximately 5 minutes, breaking up meat as it cooks. Add onion, garlic, and red bell pepper; sauté until softened, about 3 minutes.
03 - Add diced tomatoes, chopped spinach, dried Italian herb mix, and crushed red pepper flakes to the skillet. Simmer for 3 minutes, then remove from heat and allow to cool slightly.
04 - In a large bowl, whisk together the eggs, whole milk, salt, and black pepper until well blended.
05 - Stir shredded mozzarella, grated Parmesan, and chopped fresh basil into the egg mixture, then add the cooled sausage-vegetable mixture and mix to thoroughly combine.
06 - Gently fold the broken lasagne noodle pieces into the egg mixture.
07 - Evenly distribute the mixture into the prepared muffin cups, filling each approximately three-quarters full.
08 - Bake for 20 to 25 minutes or until the muffins are puffed, golden, and a toothpick inserted in the center comes out clean.
09 - Allow the muffins to cool for 5 minutes before running a knife around the edges to release them. Garnish each with extra chopped fresh basil before serving.