Preheat your oven to 400°F (200°C). Carefully cut the tops off the bell peppers and remove the seeds and membranes, creating a hollow cavity for the filling. Place the peppers upright in a baking dish.
Heat olive oil in a skillet over medium heat. Add the minced garlic and sauté until fragrant, about 30 seconds, filling your kitchen with a warm aroma.
4 large bell peppers
Add the chopped seasonal vegetables to the skillet and cook until just tender, about 3-5 minutes. Stir occasionally to evenly cook and soften the vegetables, releasing their natural sweetness.
4 large bell peppers
Remove the skillet from heat and stir in the cooked grains. Mix well to combine everything into a cohesive filling. Season with salt and pepper to taste. Let it sit for a minute to allow flavors to meld.
4 large bell peppers
Spoon the filling evenly into each hollowed-out bell pepper, pressing gently to pack the mixture slightly but avoiding overflowing.
Sprinkle shredded cheese evenly over the filled peppers, if using, for a golden, cheesy top after baking.
4 large bell peppers
Bake in the preheated oven until the peppers are tender and slightly browned around the edges, about 25-30 minutes. You'll hear gentle bubbling and see the tops turn golden.
Remove from the oven and let the peppers rest for a few minutes. Then, serve warm, garnished with fresh herbs if desired, revealing their vibrant colors and savory filling.