Let's cook.
Heat 1 tablespoon of olive oil in a large skillet over medium heat.
Add the crumbled breakfast sausage to the skillet and cook, breaking it apart with a spoon, until browned and cooked through, about 5-7 minutes. Drain any excess grease.
Add the diced green bell pepper, red bell pepper, and onion to the skillet with the sausage. Cook, stirring occasionally, until the vegetables are tender-crisp, about 8-10 minutes.
While the vegetables cook, whisk together the eggs, milk, salt, and black pepper in a medium bowl until well combined.
Pour the egg mixture over the sausage and vegetables in the skillet. Cook, stirring gently, until the eggs are set and fluffy, about 3-5 minutes.
Serve immediately.
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