Preheat the oven to 400 degrees F. For easy clean up, line a large, rimmed baking sheet with parchment paper.
Arrange the cut sausage, bell peppers, and onions in the center of the pan.
Drizzle with the olive oil and red wine vinegar, then sprinkle with the garlic, salt, basil, oregano, black pepper, and red pepper flakes. Toss to combine, then arrange in a single layer.
Bake for 25-35 minutes, until the peppers are as tender as you like, tossing once halfway through. Remove from the oven and serve hot.
Notes
TO STORE: Refrigerate leftovers in an airtight storage container for up to 4 days.
TO REHEAT: Reheat gently in the microwave or in a non-stick skillet over medium-low heat.
TO FREEZE. Freeze leftovers in an airtight, freezer-safe storage container for up to 3 months. Let thaw overnight in the refrigerator before reheating.
SERVING IDEAS: Try this Italian sausage and peppers over rice or cauliflower rice, inside a toasted hoagie bun with a slice of provolone cheese (bonus points for warming it in the oven to melt the cheese), or with whole wheat pasta noodles and tomato pasta sauce. I also like to sauté the leftovers with spinach, then top them with a fried egg for a tasty brunch (or brinner!).
Nutrition
Serving: 1(of 4), about 3/4 cup cooked sausage and peppersCalories: 290kcalCarbohydrates: 10gProtein: 14gFat: 23gSaturated Fat: 4gPolyunsaturated Fat: 1gMonounsaturated Fat: 8gCholesterol: 60mgPotassium: 169mgFiber: 1gSugar: 3gVitamin A: 1335IUVitamin C: 96mgCalcium: 20mgIron: 1mg