### Instructions
1. **Brown the Meat and Veggies:** Heat the olive oil in a large skillet over medium-high heat. Add the ground Italian sausage and cook, breaking it up with a spoon, until browned. Drain any excess grease. Add the diced onion, bell peppers, and mushrooms to the skillet. Cook, stirring occasionally, until the vegetables soften, about 5-7 minutes.
2. **Add the Sauce:** Pour in the marinara sauce and stir to combine with the sausage and vegetables. Reduce heat to low and let it simmer for 5 minutes, allowing the flavors to meld.
3. **Assemble the Bowls:** Divide the sausage and vegetable mixture evenly among oven-safe bowls or ramekins.
4. **Top with Cheese and Pepperoni:** Sprinkle each bowl generously with shredded mozzarella cheese. Arrange the mini pepperoni slices on top. Add any additional desired toppings at this stage.
5. **Bake to Perfection:** Place the bowls in a preheated oven at 375°F (190°C) for 10-15 minutes, or until the cheese is melted, bubbly, and slightly golden brown.
6. **Serve and Enjoy:** Carefully remove the bowls from the oven. Let them cool for a minute or two before serving. Garnish with a sprinkle of dried oregano or red pepper flakes if desired.
### Short Tips
* **Prep Ahead:** Chop your veggies and prepare your sausage mixture in advance for an even quicker dinner assembly.
* **Vegetarian Option:** Omit the sausage and load up on your favorite vegetables, or use a plant-based ground “meat” substitute.
* **Spice It Up:** Add a pinch of red pepper flakes to the marinara sauce for extra heat.
* **Kid-Friendly:** Let the kids choose their own toppings for a fun, interactive dinner.
* **Portion Control:** These bowls are naturally portion-controlled, making them great for managing your intake.
