Step 1

Preheat oven to 425°F. Toss together bell peppers, sausage, onion, thyme, oil, garlic powder, and 1 teaspoon of the Creole seasoning on a 13- x 18-inch rimmed baking sheet; spread mixture in an even layer. Bake until mixture is almost tender-crisp, 15 to 17 minutes, stirring mixture once halfway through cook time.

Step 2

Meanwhile, thinly slice dark green parts of scallions; set aside. Thinly slice white and light green parts of scallions; transfer to a large bowl. Add shrimp, drained tomatoes and green chiles, and remaining 1 teaspoon Creole seasoning. Using your hands, crumble rice into shrimp mixture to separate any clumps; stir to combine. Set aside until ready to use.

Step 3

Remove baking sheet from oven. Stir shrimp mixture into bell pepper mixture on baking sheet; return to oven. Bake at 425°F until shrimp are pink and opaque throughout and rice is warm and tender, about 9 minutes. Sprinkle with dark green parts of scallions.