Preheat oven to 350.
Mince red onion and green onion. In a large skillet, heat olive oil over medium heat. Add onions and let it cook for about 5 minutes.
Meanwhile, chop bell peppers and jalapeno. Add the veggies to the skillet. Crumble the veggie crumbles into the pan and pour the diced tomatoes in.
Add the taco seasoning to the mixture and mix together well. Let it cook for 10 minutes.
Combine the rice with the veggie/crumbles mixture. Season with salt and pepper.
Evenly distribute into an 8x11 baking pan. Sprinkle cheddar cheese on top.
Allow the casserole to cook until the cheese bubbles, 15-20 minutes. In the mean time, dice the avocado.
When the casserole is done cooking, remove from the oven and top the mixture with avocado chunks.
Enjoy the dish with sour cream, salsa, tortilla chips, etc.